The more you help her with the problems, she'll more than likely get attracted to you, and break off.
Fucking LOL, how old are you? I don't mean that in the derogatory sense by the way, it's just that most people over 17-18 realise that what you're suggesting is the polar opposite of what you should be doing if you actually want a girl to like you.
To OP, that's the absolute worst thing you could possibly do if you want her to be attracted to you.
BUT, you're pulling a really dickish move here by trying to get with a friend's girlfriend. The fact you're asking on sythe of all places for advice tells me you won't get with her anyway, but it shows an awful side of your personality. My advice to you would be to just leave it alone, even if they break up. If they DO break up on bad terms (face it, they're 15, of course it will be on bad terms) then nothing will piss off your friend more than getting with his ex-girlfriend.










