What do you say to a guy who says he misses you but you don’t miss him at all?

It’s been a while seen I’ve been on here. Recently I have this guy from my childhood bombard me with messages saying he has had a crush on me for years and still does. Thats not the problem. The problem is he has an unhealthy obsession with me. I told him multiple times I only like him as a friend. He seemed to accept it for a while but then he keeps telling me about his crush on me, that he misses me and wants to cuddle me so badly. We have nothing to talk about. The only things he can talk about is his crush on me, how much he wants me, how much he misses me and his traumatic car accident he had 3 years ago. Any other topic hits a dead end as he only responds with “lol”, “I know”, “okay” and just one word replies like that. I try to keep the conversation going but I end up not replying because of that. We can go months without speaking. Previously I have said “I miss you too” but that just made him even more clingy.

He says he misses me every time I interact with him but I don’t miss him at all. I kind of cut him out of my life. His family are family friends of mine and so he knows my parents. If he sees one of my parents he will ask him what I’m up to, then my parents will tell me I should reach out to him and catch up with him. I don’t tell him my reason why I don’t because they will just tell me he has a disability (I’m not sure how true that is) and that I should at least acknowledge him and be nice to him.

Any advice is appreciated.
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Sorry for the typos and wrong use of words. I typed this on my phone and my autocorrect changes things a lot
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I forgot to add an extra detail that really gives me the ick. He has aggressively hit on his underage coworkers too
What do you say to a guy who says he misses you but you don’t miss him at all?
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