Confused with ex🫠

So I’m in a relationship for 3 years.. we have our ups and downs but mostly downs the most time.. i think we just got used to each other and lost interest but still love each other…

Then my ex shows up. We were talking 3 years ago stopped cause he only wanted sex and I didn’t and now after 3 years after he broke up 1 month later he messages me but I didn’t talk to him a lot and let it go but he still shows interest by liking my pictures and stories which he never did before. And I’m very curious what’s he’s interested about😅

Any suggestions???