Most Helpful Guy
If she's got a boyfriend, I would stay away from her, even if he's a scrawny ass dude.
I'm not about to ruin a dude's life just because of a girl, and if she lets me flirt with her, then she's kind of a hoe who'll probably cheat sooooo no point in going for her.1
Most Helpful Girl
I think it would be better to not do that. She is in a relationship - and you must respect that. If in time she becomes single and realises that she wasn't meant to be with him then you can make your move.0