So i found a new girl, we dated for a bit, and decided things weren't going to work out. About a week later, she ends up with my best pal. After talking to her, I realize we both still love each other very much, but she's dating my buddy now.

Here's where things get interesting. Her birthday party's coming up, and she tells me all this stuff about how she misses me and loves me, and ends up saying she wants to have sex with me. This is pretty big considering i'm still a virgin.

her bf/my best friend is most likely going to be there, and it would be fucked up if he saw us. I know i want it, but he's one of the coolest pals you could get as a friend. Totse, should i do it and risk losing a buddy?

Dude, your friend is a dick. If he gets pissed because you have sex with her, thats rediculous. Friends aren't suppose to date their best friends ex.. espicially within a week. Fuck her, and tell your friend whatsup. I can't believe you're even asking, probably why your friend thought he'd get away with it....

Nice....!

Tell her to end it with the dude. If she doesn't she's a manipulating slut.