What do you think of this guy?

I am talking to a guy and he is four years older than me. We are in our 20s, which I think it is not a big deal. But he keeps mentioning it often and about how he has more experience in life in general. I have been very transparent with him and have not given him a single reason why he should doubt about our age gap. I think he is acting very immature and disrespectful.
What do you think of this guy?
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