How come he always acknowledges me but never talks to me?

This guy I like at work I think he likes me too I’ve caught him looking at me multiple times even when I’m not looking he seems to get nervous around me and fine around other people I even caught him looking and smiled and waved at him once he smiled and waved at me I did that to seem like an easy person to talk to and he always says hi Victoria without eye contact when he walks past me and today he said hi Victoria and was getting water behind the register I was like oh is the deli busy and he goes “no clue” while looking anxious or nervous I don't know but I kno he was in the bathroom before so obvi he wouldn’t kno but why did he just say that he never makes an effort to talk I don't know what should I do? Is this normal or is he just not interested

How come he always acknowledges me but never talks to me?
Post Opinion