Is this a red flag? and is this wrong?

First thing is it wrong for a guy to like his uncles wife’s niece. First time I met this guy after leaving he couldn’t take his eyes off of me. Second time my family and his uncle and my aunt went to a amusement park and a bug was on me and nobody but him saw it on my head so he took it off of me. So you know he was staring at me. Anyways later he asked for my number so I gave it to him. Now I wished I didn’t give it to him. Not even 24 hrs of getting to know each other he texted me you know one day I’ll be your husband like wtf dude. I texted him your moving way to fast and aren’t we like family now. Anyway since that day I haven’t text him as much anymore because I feel like he is rush thing and talking about marriage and kids way to fast. I’m 4 years younger then him tho. I don’t know what to do know 😭.
Is this a red flag? and is this wrong?
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