How can I get him back?

I was dating a guy on and off for 10 months. We got on really well, had a strong attraction etc.
He ended it, saying he can;t have a relationship at the moment as he needs to focus on himself (doesn;t have a job, recent bereavement, anxiety). I got really upset as I felt Id been strung along for a long time and it spirlled into a massive argument and he said some really nasty things.
He then blocked me on everything, although did temporarily unblock me a week later to send a massive essay basically saying he cares about me and that it was all him. He also said we may be able to meet up in a month or so if I want. He blocked me again before I had a chance to respond.

We live in the same building and are family friends, so even though im blocked on everything it hasn’t been a complete clean break.

We are also in lockdown and he doesn't work.

I respect the fact he doesn't want a relationship but I want him back as a friend or to date him casually again, I really miss him and hate how im blocked.
How can I get him back?
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