I would just do nothing if I were in your position.


I mean you knew he had a gf right? Unless I'm remembering a previous thread incorrectly, so whether he actually likes you or not is irrelevant as he's clearly not dumping his gf for you.


My advice? Don't get excited about anyone who's in a relationship, firstly them showing interest in you is already a negative reflection of them (they clearly don't respect commitment) and secondly, its just complicating something that should essentially be quite simple.


Now if the person is available, and appears to be a decent human being, then no reason to not indulge and see if romance blossoms.


Hope you feel better soon.