That reads like "Listen, I know I acted like a big, creepy jerk, but I'm pretty much solely responsible for all the fun times you're enjoying now so the least you can do is acknowledge that and be nice to me."
He's still a big, creepy jerk. I'd ignore him.
That's how it read to me, also. The second half of it is, "I'm the reason you came to place, I'm the reason you met person, I'm the reason you had fun." The only reason to add these things in is to make it look like a) deep down he's actually a lovely bloke despite acting psycho intermittently, or b) the OP owes him. Both are incorrect; the second is frankly audacious.
The thing with relationships
is that when something changes and a person crosses a line, things can't go back to how they were before (which is what he was asking). An example everyone knows well: people almost never stay friends after a break up, and on the rare occasions that they do, it's a different kind of friendship from before. When something changes in a relationship
dynamic, things can't just go back to how they were before.
It's good that he seems to have finally clued in to the fact that he was way out of line, but it's far too late, and what he is asking is unreasonable. Also he makes no indication that this won't happen again when another 'bad aura' comes along. It reads nicely until you stop to think about what he's actually saying, and then you realise that it isn't much of an apology. "Sorry I did bad stuff, it was just because I was feeling kind of funky." This doesn't address all the crazy "my mother said you were a bad girlfriend" nonsense; he doesn't mention it at all, actually. And first and foremost, the OP does not feel remotely comfortable with this guy (neither would anyone sane, I fear) who has shown that he has a very possessive, ugly, crazy, stalker side to him.
Either tell him one last time "sod off and I will not contact you again" (better put, of course) or continue to ignore him. Either way, update your Facebook privacy settings if you haven't already. But be aware that responding will send a message that if he writes something that sounds heartfelt (on the surface, anyway) then he knows he can get a response, and will quite probably try harder for a response in the future.