Love advice? many opinions wanted!?

maybe you like him because he's unavailable. or maybe you were already secretly envying the couple in front of you, and then when you realized this was a person you knew, it seemed more realistic that you could have been that lucky girl. But anyway, if he's been with her for two years...I wouldn't recommend testing out your feelings on a happily committed couple. best you can do is friend him on face book or something and keep an eye on his status. if they ever break up, maybe then you could try to figure out your feelings.