If you know you aren't a Christian and you are scared about what everyone would think if they knew that, I just want to encourage you by saying staying if your pride is not worth an eternity without Jesus.
In the end it doesn't matter what anyone else thinks. when you stand before the Lord and give an account of your life, it will JUST BE YOU AND GOD---and in that moment WHAT GOD THINKS WILL BE ALL THAT MATTERS!!!
So don't let your pride and fear keep you from KNOWING CHRIST and a personal relationship with Him.