Ex is acting weird?

This guy I had a previous fling with had one of our mutual friends call me one night to come out to the bar they were at. He had everyone wait outside in the cold to see me pull up and to say hi. He smiled the whole time and was making snarky comments when I didn’t acknowledge him. He then lied to me saying he has a girlfriend but everyone told him he was lying and that he loves me. I told him that I was
Tired of someone who doesn’t wanna commit to me and he started crying. Fast forward to now, I went to eat at the restaurant he works at and he got upset that I was there. He then wanted to come out after to “clear the air” but then he “didn’t wanna talk about the past and wants to just have fun” but then he never showed up. Obviously I’m not gonna be with this guy but I just wanna know like what is going through this guys mind? He says he doesn’t like me but everyone says that he is obsessed with me.
Ex is acting weird?
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