Matters of the heart

[imthaifool]

Is it ok to hit on a girl and ask a girl out that is not single and she's made it clear that she has a bf? If so how do you pull it off? Second, is it ok to be in love with someone else's gf and if so can you pursue that love or is that crossing certain boundaries that are plain wrong? Same situation but instead of gf it is someone's wife, what then? I always remembered hearing if you really love someone then go after them.