Why is he like this, what should I do?

So basically I used to be best friends with this guy who later turned out to be a player (which is why I stopped being friends with him). We were really close and our friendship lasted 6 months. He had some interest in me beforehand but never reached out to me until 2 years ago (when we got really close). He acted how a usual friend would, he'd laugh at all my jokes and have the banter but he'd always touch my hair, hands and flirt in his own way like you'd expect from a player. He was really loud and really funny at that time and an amazing person to be around except for his controversial opinions and later his betrayal that I'll never know was accidental or purposeful (he started hanging out with a girl that made my life awful and stopped being friends with me), I called him a misogynist because I assumed he was playing with my feelings and I was really angry about all the girls he was dating and dumping after he stopped hanging out with me (the poor girls) One thing weird about him is that he did talk to me about all the girls he's dated and why he broke up with them (I don't know why he told me this).

Now back to the present. After the falling out, we've always just had this unresolved conflict between us which has now turned into somewhat enemies. though one thing I notice is that A, he's changed a lot since we stopped being friends I. e according to my friends, he's lost so much of his loud extraverted self (it very rarely comes out now. he's just really quiet) and he doesn't seem to be so upbeat and jokey like he was and B, He keeps staring at me and trying to get my attention. There's something that he wants from me and I don't know what he wants. I want to confront him but I don't think it's a good idea

Why is he like this, what should I do?
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