Should I block him?

There’s a man from a dating site who’s pursued me relentlessly who I’ll call ‘Bruce. Bruce knows personal stuff about me, like the fact that I was offered the chance at a genuine modelling career (something I never told him and I rarely discuss with anyone).

Bruce claims that we don’t know each other offline, but for him to know something personal about me, that indicates that either someone mentioned me to Bruce, or that Bruce lied about not knowing me. I spoke to my best friend and she said it’s suspicious. I think it is, too. I spoke to my mum and aunt and they both think it’s someone I know.

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It’s not the sort of thing he could’ve guessed, either. I don’t look like the kind of woman who’d be a model.
Should I block him?
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