Is this guy interested in me or just being nice?

There is a coworker of mine who is quite handsome and sweet, we are same age and I am also his manager, but the thing is he has a girlfriend that is why I’m confused.

He ask people stuff about me, he compliments my outfit, and chit chat with me for sometimes me after we do the work talk stuff.
When we talked about travel destinations, I asked him why he never visited Thailand he says we should go together, once I asked something from him, he brought to me with the coffee I left on other table as well

However, he never ask me out or do anything physically, our finger touched accidentally and both of us awkwardly flinched. Is he just be nice or might interested in me I’m very confused

Is this guy interested in me or just being nice?
Post Opinion