Ex liked my photo?

So I was seeing this guy for 6 months who I was really good friends with, he recently ended things between us 3 weeks ago as he didn’t want a long distance relationship and had met someone closer to home. I removed him off everything and told him I couldn’t be friends with him as I need to move on.

He wasn't happy that I didn’t want to remain friends & blocked me on fb after I had unfriended him. I’ve been moving on with my life and we haven’t spoke since. Today he has liked my insta post of me being away on a trip. He’s not one for insta and never liked any of my pictures when we were together. Why is he all of a sudden liking my posts and trying to remind me he’s still there?
Ex liked my photo?
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