Guy who likes me suddenly called bro?

Anonymous
I have this guy friend who I am almost certain that likes me (people around us also think the same). Lately I have been excluding him from my outings and lessened my conversations with him since I didn't want to lead him on. We used to hang out a lot both in group and one on one setting but I started hanging out with my other 2 friends (a guy and girl) and naturally engaged in more convos with with them. Today after seeing me at school he messaged me 'Hi bro' the very term I once used and he directly told me to not call him that, when I said this is the 1st time I see u calling me like this he said just wanted to joke. Do you think he did this to make me jealous, test the waters or show me cold shoulder for excluding him or that he decided to give up? (I guess he has liked me for 2 or 3 years given his behaviour)
Guy who likes me suddenly called bro?
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