Commit, but with a little extra...

You smile to yourself as an idea presents itself.
"I'd love to be your boyfriend," You say, "But you're totally cool with me fucking other girls, right? In fact, you're bi, aren't you?" She smiles and nods, her dark boobs bouncing a little, and goes in for another kiss. You disconnect and she looks over your shoulder at the girls behind you all making out. She squirms a little, her body rubbing against yours.
"Damn, that's hot..." She breathes.