Can y’all help me make sense of a situation I keep finding myself in?

There’s a white guy at my job. About 3 in shorter than me and 4 years younger. After attending one work happy hour together, I think he likes me.

He kept hovering around me and talking ideas at me. He kept saying that he loves socializing at work and - at one point - complained that our other coworkers don’t drink and hang as much as he’d like us all to. He “doesn’t believe” in working from home. He celebrates the shitty corrupt local politicians in my city, saying that they are “trying their best”. He tries to play Devil’s advocate.

I am the complete opposite, and it’s obvious in my presentation: I am more masculine in appearance, unambiguously Black, shaved head, socialist/communist, feminist, blah blah blah.

Toward the end of the night, he asked for my number, saying we should “hang out outside of work.” I gave it to him, idk why. 30 minutes later, he tells me he’s in love with his girlfriend. Then he offers to walk me halfway home (I decline).

I plan to avoid him, so I’m not asking for advice on what to do. I guess I’m just asking like why do WM do this? I tend to have these types of interactions with WM: we are politically and socially opposite, they don’t seem to date or be interested in BW, but something about me excites them and they want to get close to me. They don’t want the night to end. They want to keep talking. What do yall make of this? Does this happen to yall?