I'm not going to lie to you. If she has a boyfriend, things do get complicated, as women tend to be kinda "possessive" about their boyfriends or husbands, that's the woman's nature. That's why women always try to steal another woman's man, they feel superior for doing it. Now, I've seen some real dumbasses that had some cute and intelligent girlfriends, who could be with someone better, but... go figure. So, it'll be kinda hard to beat this guy out...
I hope things do work out for the best, I really do, but no matter what happens, keep your head up and smile, as you've just experienced one of life's gifts...