what an idiot 😂

You sit with him every day and he doesn't recognize you when you get a tan?

You may not know him well, but he seems rather stupid. Is that what you want?

Yea, no; *nobody* wants that....
While you can't fix Stupid, you can still duct-tape 'im so as to keep him quiet - and your sanity/ peaceful solitude intact, right?
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Without more context this sounds like awkward-clueless-guy flirting to me rather than him actually not knowing who you are.

That was actually my thought, having once been the kind of guy who would pull that. I once sat on a bus next to a really cute girl for both legs of a 2.5 hour field trip without saying a word to her because I had no clue on how to start a conversation. (We finally became friends on Facebook 35 years layer and got together at our 40th reunion.)

Still, I would never have added the "she's really weird" part, especially if it was a girl I liked.

Ok, he was making a joke, and you were to dumb to see that. On you girl.

oh,a joke that is also an insult. How passive aggressive of him.

I would have just said, " oh, you know my twin?"