>>15 Ew I don't like the idea of "staying ready" as if every other female could be disposable. Despite this, OP, it's very likely that your next relationship will be a rebound relationship whether you mean for it to be or not.

>>1 There's nothing wrong with stealing her from her boyfriend. Doing so would not be a violation of your friendship with her, if you're so inclined. I'm not trying to persuade you to do it, but you shouldn't feel guilty if you want to.