Yes, I understand your fear, but I deeply hope you won't let it keep you from renewing your faith in God. The Bible warns, "If you are afraid of people, it will trap you" (Proverbs 29:25, NIRV).
After all, friends may come and go -- but God never does. His love for us is unchanging, and so is His promise to be with us and bring us to Himself once this life is over if we know Christ. Don't let the pressures of the crowd keep you from Him. After all, a hundred years from now, which will be more important: a few fleeting friendships now, or the eternal friendship of Christ? The Bible says, "Jesus Christ is the same yesterday and today and forever" (Hebrews 13:8).
The most important truth I can tell you is that God loves you and yearns for you to come to Him and become part of His family. How do I know this? I know it because He sent His only Son into the world to give His life for you. The Bible says, "For Christ died for sins once for all, the righteous for the unrighteous, to bring you to God" (1 Peter 3:18).
By faith turn to Christ today, confessing your sins and asking Him to come into your life. Then seek out a church where you can grow in your faith -- and where you'll also find new friends.