How do you ask a friend to have sex with you?

I am a 19 yr old male and have never had sex before although I have had a few girlfriends in the past. Right now I don't know what is happening to me... I really want to have sex and I don't care if it's with a girl that I'm dating or anyone else. The first person that comes to my mind is a friend of mine who may still have feelings for me. She's still a virgin and of my age and talks to me about how she gets turned on easily by guys, etc. and I know that she wants to have sex as well but I just don't know if she still has feelings for me. Either way it could backfire so I just wanted to know if you could help me figure out how I can ask her to have sex. Thanks a lot.