How can I convince my girl friend to fool around with me?

I have a long question about this girl I ve liked for a while. I met this girl when I was a freshman in college, now we are both juniors. This girl is a 6 2" dirty blonde haired, fair skin, bluish green eyes who loves volleyball and is a really friendly girl, plus she has an amazing butt and eyes, I just can t stop thinking about. She really reminds me of Jennifer Anniston and the Diana Rigg; a Bond Girl! I keep fantasizing about her and I naked and fooling around. My fantasy is getting a bj (oral sex) from her while I eat her out or even just playing with her breasts!

What can I say and do so I can live out this fantasy, what should I do that my girl friend will say yes, feel ok, and won t regret doing it with me?. We are't dating or anything serious like that, we have gone out a few times and had fun! I just can t stop thinking of this, I m always getting a hard on thinking about her and her kindness, her eyes and her body! I don't want to have sex, I just want to give and receive oral with her, what should I do?