I hope you'll think seriously about what your friends are saying, because they honestly care for you and know that you'd be a better person if you committed your life to Christ. They've experienced His transforming power in their own lives -- and they know it could happen to you.
What difference would Christ make in your life? First, He'd give you a new purpose in life. When we give our lives to Christ, we begin to realize that God put us here for a purpose -- and life's greatest joy comes from discovering it and doing it. You'll no longer be living aimlessly and only for yourself, but you'll be seeking God's will for your life and learning what it means to live as God's child every day. The Bible says that Christ "died for all, that those who live should no longer live for themselves but for him" (2 Corinthians 5:15).
Then Christ also will give you a new strength -- the strength to live the way you should. You see, when we sincerely commit our lives to Christ, God Himself comes to live within us by His Holy Spirit. He helps us break the habits and attitudes that drag us down, and He gives us a new love for others and a new desire to help them in His name.
Finally, Christ will give you a new destiny. We weren't meant for this life alone; we were meant for eternity -- to live with God forever. Don't let anything keep you from Christ, but by faith accept the gift He offers you today -- the gift of His salvation.