Don't know where to start

[Baruch]

TopCat ... life is a scream ... we all scream when we emerge from our mothers.  But with effort and experience, we can learn to both accommodate ourselves to the way things are, and to find ourselves too.

"First they ignore you, then they laugh at you, then they fight you, then you win." - Mahatma Gandhi

[carole123]

That is pretty tough!   I would advise you to not confront your parents with your beliefs.  As others have said, they will not change their minds, no matter what evidence you have.  You will have needless arguments, tears and threats.  Avoid all that. 
Love them and accept that they have this delusion.  It doesn't hurt you if they believe in God.  As for college, work on getting a scholarship to the school you want to attend!  That puts you in charge of where you go to school. 
Live peaceably with other...listen to them and smile and believe what you believe.  No harm in being pleasant and kind. 
Good luck and I look forward to reading your post.