IMO, if the girl is implying more than just friends and she has a boyfriend, even if her boyfriends the biggest ******** ever, I'd never get involved with a girl who'd go out with the intention of growing into something more while they had a boyfriend of any type. Once a cheater always a cheater and it just implies that she can't be single because if she was interested in you it means that she's not interested in her own relationship which implies she can't end one without falling into another. Unless she just wants to be friends and nothing more she sounds needy and unfaithful. Just my opinion!