I was arguing about evolution vs creationism with my best friend today?

I'm an Atheist and she is a Christian, best friends for a long time. We were stoned when we were arguing about our beliefs or lack of, i proceeded to bring up Charles Darwin and she said "Who's that?" That shocked me because Darwin is my hero and my friend is graduating college soon, I'm concerned. She doesn't even know what division of Christianity she belongs to (she's a protestant, yes I know more about her than she does about herself). Should I remain friends with her? LOL, I'm kidding but seriously, wtf haha.