I seem to have this guy who is badly fixated on me and that fixation makes me very uncomfortable - how can I break it off without ghosting him?

I even mentioned yesterday that my brother is 6'2" as a means to try and intimidate him (he's only 5'6") into rethinking this idea he has of visiting my house and that I share the house with my brother. It did and didn't work. He proceeded to ask my brother's schedule so not around.

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+1 y
He quite literally phoned me the minute he got home without texting me if okay, etc. I definitely gotta block him after this.
I seem to have this guy who is badly fixated on me and that fixation makes me very uncomfortable - how can I break it off without ghosting him?
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