God respects our freedom to choose. He gave man free will, and if anyone chooses to spend eternity apart from God, he will let him do so. The question is what each of us will do. What will you choose?
Will you choose sin and separation? A life of selfishness, greed, and anger? A life of bitterness, frustration, even despair?
Or will you choose to become what you should be? Will you choose to embrace God's love (even through the carrying of your own cross), to receive his forgiveness and healing, and to live as he made you to live--the only way you can be truly happy?
If you choose the latter, you must become a follower of Christ, a Christian. To do this, you must repent of your sins, believe in Christ, and be baptized. God will enter your life and fill you with his Holy Spirit.
Part of being a Christian is belonging to Christ's Church. Jesus founded a Church to care for and guide us as we make our way through life. It is a Church full of saints and sinners, but it is also the source of grace and true teaching.
God's Love for You | Catholic Answers