Why is he doing this?

Split up with my ex last year and moved out of our house. I moved cities as well so I’m quite far from him. We’ve been speaking for a few months now. And I keeps sending me photos of what our house looks like now. And said I threw our relationship away etc and says I’m missing out on lots. But when I do hint at dating again, he doesn’t like it? I don’t get? He also sends photos himself as well and says it’s a shame I’m far away. Why is he doing this? What should I do?
Why is he doing this?
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