Why does he point it out when I blush?

Oookay. I guess I know to some level that this guy likes me already. Currently I'm trying to gauge whether it's just a little bit of flirtation, or if he full on has a crush on me. We tend to flirt a lot, like constantly exchanging banter and roasts. Yesterday, we were talking. Every once in awhile, he'll call attention to the fact to my behavior if it seems as though I like him, sometimes I'll blush or get flustered. I'm not sure if I should be bothered because I wonder if he just likes the attention he's getting from me, or if he's spending time getting to know me because he genuinely likes me as a friend, or maybe more. (Guys) under what circuimstances would you point out someone else blushing, is it innocent or does that demonstrate that he just enjoys the ego boost?

Why does he point it out when I blush?
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