Can anyone explain if this taken guy is secretly interested in me or just being a friendly guy?

At work he will be giving some attention, he can call out my name more than once or he always greets me good morning and sometimes he may have small chat with me, he got mad at me the other day bc I kinda ignored him and he started raising his voice at me now I don't know if that’s his way of joking but the next day he tried greeting me again and I said hi back he was like I was about to say…. But other than that I do catch him glancing at me from distance often and yesterday and today he did come out of his way and help me with work related issue without asking I don't know what’s his problem

Can anyone explain if this taken guy is secretly interested in me or just being a friendly guy?
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