Ex unblocked text he misses me do I reply now later?

I was seeing a guy for a while on off before & during lockdown , he was too flaky or cancelling plans so I cut him off told him I wasn't interested. He came back this summer he apologised for how he acted said he should’ve treated me better. we got back together in a weird situationship it was long distance he’d moved away we were going to try make it work. He kept inviting me to visit him there. Everything was fine he blocked me on instagram a few weeks later. He met another girl when he got back I asked why he blocked me. I blocked on everything told him I wasn’t interested anymore don't come back again annoyed. After 4 months he sent me a message on instagram "Hi how are you? you're probably mad at me but I miss u" . I blocked him I didn’t didn’t want to talk to him. Now I want to talk clear the air as we ended very badly. It’s months later now I feel ready to reply , I had him blocked on everything. I don’t want him back more of a let’s talk

Ex unblocked text he misses me do I reply now later?
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