Hypocrite... oh well! My stance on this is, unless I personally know the guy its a no go. If I don't know who the bf is... Who cares! As for your disliking of her bf, I guess you won't be bothered about their relationship. I don't have advice on how you can go about this, as I'm not and expert in the field of pulling attached girls (that i know of) - but try looking for Style's Boyfriend Destroyer on google, this may help you!

My 2 cents,

Ritz