You'd do better to study the Bible, anything that doesn't match up isn't true. Like sacraments...
As for your friends telling you that what you do doesn't matter, they're partially right. What you do won't get you to heaven. However, there are some people who are going to get to heaven and there are some people who are gonna come roarin' in with a whole crowd of people, screaming with exhilaration, if you get what I mean.
Before I say too much about sacraments, perhaps I should define what a sacrament is according to Catholic Church. I will quote from a book by Canon Francis Ripley titled, This is the Faith. Then I will put a list of supporting verses together that indeed demonstrate that sacraments come directly out of Scripture.
A Sacrament is an outward sign of inward grace, ordained by Jesus Christ, by which grace is given to our souls. The Sacraments always give grace to those who receive them worthily. The Sacraments have the power of giving grace from the merits of Christ’s Precious Blood, which they apply to our souls. We should have a great desire to receive the Sacraments because they are the chief means of our salvation. A character is given to the soul by the Sacraments of Baptism, Confirmation and Holy Orders. A character is a mark or seal on the soul which cannot be effaced, and therefore the Sacrament conferring it may not be repeated. There are seven Sacraments: Baptism, Confirmation, Holy Eucharist, Penance, Extreme Unction, Holy Orders and Matrimony.
Catholics speak of matter and form of the Sacraments. This is because a Sacrament is a sign, an external rite. This rite consists of the performing of an action and the saying of words. The action is called the matter of the Sacraments, the words the form. Thus, in Baptism the water and the action of pouring it make up the matter; the words said while that is being done are the form.
Now I will list three of these Sacraments, the grace each sacrament imparts to us, and then supporting bible verses.
There are seven Sacraments. Three of these Sacraments are called Sacraments of Initiation. They are Baptism, Confirmation, and the Holy Eucharist. I simply don’t have enough time to go through all seven at this time, and so will cover the first three, and then the last four at another time.
Baptism The sacrament of Baptism cleanses us from Original Sin and makes us true sons and daughters of God.
Unless a man be born again of water and the Holy Ghost, he cannot enter into the kingdom of God. John 3:5
Please consider the following verses:
Mt 28:19, Mk 16:16, Jn 3:5, Acts 2:38;16:15, 33; 18:8; 22:16, Rom 6:3-4. 1 Cor 1:16; 6;11. Col 2:11-13, Titus 3:5, 1 Pt 3:21.
Confirmation: The Catechism of the Catholic Church has this to say regarding the Sacrament of Confirmation: For by the sacrament of Confirmation, the baptized are more perfectly bound to the Church and are enriched with a special strength of the Holy Spirit. Hence they are, as true witnesses of Christ, more strictly obliged to spread and defend the faith by word and deed. CCC 1285
Please consider the following verse:
Now when the apostles in Jerusalem heard that Samaria had accepted the word of God, they sent them Peter and John, who went down and prayed for them, that they might receive the holy Spirit, for it had not yet fallem upon any of them; they had only been baptized in the name of the Lord Jesus. Then they laid hands on them and they received the Holy Spirit. When Simon saw that the Spirit was conferred by the laying on of the apostles hands, he offered them money and said, “Give me this power too, so that anyone upon whom I lay my hands may receive the holy Spirit.” Acts 8: 14-19
Other supporting verses are as follows: Wis 9:17, Acts 8:14-19; 13:3; 19:1-6, 2 Cor 1:21-22, Eph 1:13, Heb 6:1-2
The Holy Eucharist: Catholics believe in the real presence of Christ, body, blood, soul, and divinity. There is no greater gift than the worthy participation in the precious body and blood of our Lord, Jesus Christ.
The Catholic Church has always believed in the real presence, and the real presence has been the center of Worship for 2,000 years.
To really summarize Scripture and how it relates to the real presence is not possible for me to take up in this post, and so I invite you to study this topic on your own, and I will quote only a few supporting verses.
The Jews quarreled among themselves saying, “How can this man give us his flesh to eat? Jesus said to them, “Amen, amen, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you do not have life within you. John 6:53.
Whoever eats my flesh and drinks my blood has eternal life, and I will raise him on the last day. John 6:54
Then many of his disciples who were listening said, “This saying is hard; who can accept it?” John 6:60
As a result of this, many of his disciples returned to their former way of life and no longer accompanied him. Jesus then said to the Twelve, “Do you also want to leave?” Simon Peter answered him, “Master, to whom shall we go? You have the words of eternal life. John 6:66-68
Please consider the following verses:
Mt 26:26-28, Mk 14:22-24, Lk 22:19-20, Jn 6:47-66, 1 Cor 10:16, 11:23-30.
Now, I would like to say a few things about works. What we do doesn't matter?! Where does the Bible say this? Catholics do not believe, nor have they ever, that works alone are sufficient for ones salvation. Faith is a necessary ingredient. Faith and works are what we believe. We believe that faith alone is not found anywhere in Scripture, but faith and works is supported everywhere. There is not enough time to go over every verse in the Bible that urges us to behave according to the will of God, but I will quote a few here:
Be doers of the word and not hearers only, deluding yourselves James 1:22-25
You believe that God is one. You do well. Even the demons believe that and tremble. Do you want proof, you ignoramus, that faith without works is useless?” James 2:14-26.
I was hungry and you gave me food, I was thirsty and you gave me drink, a stranger and you welcomed me, naked and you clothes me, ill and you cared for me, in prison and visited me. Mt. 25:31-46
Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father in heaven. Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name? Did we not drive out demons in your name? Did we not do mighty deeds in your name? Then I will declare to them solemnly, ‘I never knew you. Depart from me, you evildoers.” Mt. 7:21-23
“. . . All who are in the tombs will hear his voice and will come out, those who have done good deeds to the resurrection of life, but those who have done wicked deeds to the resurrection of condemnation.” Jn 5:29
For it is not those who hear the law who are just in the sight of God; rather those who observe the law will be justified. Rom 2:13
. . . The just judgment of God, who will repay everyone according to his works. Rom 2:5-11
If I have faith so as to move mountains but do not have love, I am nothing? 1 Cor. 13:2-3
“. . . The wages of sin is death” Rom 6:23
For we must all appear before the judgment seat so that each one may receive recompense, according to what he did in the body, whether good or evil.” 2 Cor. 5:10
Once again, time does not allow me to quote all of the verses urging holy behavior. Faith alone? I don’t see it anywhere in the Bible.