'That thing about the bullying annoyed me because i know he sometimes offloads to female friends a bit too much - some men seem to expect women to be available so they can do this.'
@Rae34 ... I've read all you've said.
To be honest, I agree with @Scarby9 and others - you need to just tell him.
Some of us press return at the end of one thought ... I am TERRIBLE. for this. !! So I send 10 messages instead of 1 ... My female friends don't mind at all - we all do it. My male friends seem to like it too, in a kind of indulgent way - they know it's just how I talk. My brother says 'fcking hell stop spamming me at 6am' .... : )
This guy - you met. You fancied him. He didn't make a move. That sort of annoyed you (?) but then you settled for friendship. He sees you as someone he can open up to. He is a bit prolific. He likes you but not like that. You've been his go-to person who will listen/is on his side during the isolation of lockdown.
Main point: That's quite a role. And it doesn't suit you.
He wants: a close confidante who drinks in his every word and loves to get in deep with him and talk about everything. I know you said you talked about your issue and he 'used it as an excuse' to talk about his - but that's (some types of) friendship. You say your thing. He says his. You take turns. You explore the issues together. Try to give each other advice/the perspective they need. Respect each other's opinion. Both happy.
Yes, sometimes it's a bit of a pain and they're going on ... but then other times you go on ... that's the deal.
You want: An occasional high-five and lunch.
Please don't take this the wrong way but you sound quite unavailable to him - I don't know if that's you in general, it may be. You may be generally self-sufficient and quite fine and not need all this in-depth observation and chat. Sounds like that may be the case.
So: just tell him. Gently, kindly, tell him. (If you care about him at all) Just say so sorry but I feel bad as don't have time, etc, to read everything properly and give you feedback ... and then don't do it.
It does sound quite over the top, but at the same time it sounds like he thinks you're ok with it, and that's why he's doing it. You need to tell him.