Why is my ex acting like this?

So my ex broke up with me but for the second time within 3 days he brings up a date I was going on. I'm trying to move on and meet new people but since he found out I was going on a date he's brought it up and ask how the date was and who did I go with. When he came to my house to get his stuff he dressed up in the style that he knows I love and would show off in it and smile like he was rubbing it in that he's wearing the style I love on guys. Why is he being like this? 🤦🤷. I feel like he's trying to lure me back in after finding out about my date or just showing off to be an A-hole. What do you guys think?
Why is my ex acting like this?
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