Nothing, just that you two are close. At least that's what he thinks. Maybe he thinks you're a confidant. Or someone to talk to. In fact, some people, in addition to their girlfriends, will be with other members of the opposite sex will have ambiguous or, more sympathetic relationship, just psychological surface ambiguous only. You should not ask him if he likes you, since you raise this question, proving that you have feelings for him. Try to talk to him, his girlfriend, if he likes his girlfriend, he will not hide, from his eyes can also tell whether he really like his girlfriend. And you didn't eat the meat loaf, this doesn't fail. People around me, who haven't spent much time together, basically do what your male coworker did, I think it's out of courtesy, and I'm the same way, someone around me brought it up when I could have done it, so I have to make a stand anyways. If it's like you said, then I'm surrounded by so many of them. Oh