Not ocd related, venting :(

My ex & I have officially ended things. We did 6 months ago but idk it really finalized 3 weeks ago. Tonight was a huge bar crawl every year before thanksgiving and I saw him, his birthday was yesterday and today was the death anniversary of his best friend. I am not evil and I texted him wishing him a happy birthday and I hope that the next day wasn’t too hard. He said thanks and wished me doing well. I just said enjoy ur night and the holidays. I guess apart of me hoped he would come up to me tonight, but instead, he pretended like I didn’t exist. I did notice he was in the same area as me a lot or in a spot where he can see me clearly. We glanced at one another but only for a very split second and look away fast. Apart of me wishes I just looked at him longer. I put myself in places where I was alone so he would approach me but he’d just walk by me. And i was fine the entire night, I didn’t worry about girls besides one who I have always disliked and felt weird about. But I just noticed him barely even talking to any girls at all, which isn’t like him what so ever. I was sad to leave because I was close to him and I liked seeing him. He wore a jacket I bought him that he has not worn in so long and he has grown his hair out how I used to love. He just looked like he did when we first got together and it made me feel sad. I’m hurt because it’s really over and also because I just hoped he would have at least said hi and approached me. Maybe it would have been too hard for him. Maybe he wasn’t ready. Idk. It just hurt a lot.