I'm still having random thoughts about my ex after 1 year,I have a gf and its uncomfortable what is happening to me? I'm not happy I think I'm broken

my grades are super bad, my ex moved on, i have no real friends at all, and i feel empty inside. i feel nothing but i feel so many emotions at the same time. i wish i would’ve done better in life. i push people away but then complain about being lonely. me and my ex broke up 8 months ago and i still can’t get over him. he got a girlfriend a week after our breakup and it makes me think about so many things. i’ve talked to guys after that but none of them are the same, i got this feeling with him i got with nobody else and it hurts to know i won’t ever get it back. i feel like im not good or pretty enough for anyone. i feel to difficult for a relationship and to tired. i compare myself to his new girlfriend all the time and i can’t stop. why can’t i be as pretty as her? what was so wrong with me that we had to stop talking? we talk every month as friends but it lasts an hour. my heart craves his love again but i know i won’t ever get him back. i remember this one time i tried cutting off all contact with him because of his girlfriend. when i did, he said he didn’t wanna fully let me go because im a good friend to keep around and he knows ill always be there. i don’t know if he still means that because it’s been months but he still texts me first sometimes. i know i need to let go but im stuck in life and i just need him to help me like he always would. but i cant get his help so i feel stuck and confused and sad and empty.

My ex boyfriend broke up with me last summer and it was really rough on me even thought we only dated for a little while. He treated me terribly but I guess I wanted it to work. However during the fall I was healing well and met my current boyfriend. I knew him as a kid and we reconnected and started dating. It’s the most WONDERFUL relationship ever and I love him so much. However for the past couple months, on and off, I have been obsessively thinking about my ex, to the point of feeling so sick to my stomach. Just the thought will do it. I have been stopping myself from checking his instagram because that just makes it worse. I do not want me ex back at all and I am so happy now. I recognize these thoughts as intrusive and hurtful. I just want them to stop and be in the moment. Has anyone had a similar experience? What did u do? Also, I want to tell my boyfriend about this but I am unsure on how to do so.

I’m overanlazing alot of things. My first post on my profile covers everything but I’m so worried and like nervous reck of what my ex boyfriend could be doing. We are on no contact for almost 3 weeks now which is the longest we’ve ever gone. I’m getting so much into my head like if he already moved on, or if he’s talking with some girl already, or letting a girl hit on him. Or even going back to bad habits. It’s been driving me nuts for the past few days. I’m still mad at him for hurting me mentally but miss him too. I keep thinking there’s something wrong with me, wrong with the way I’m thinking, like I’m not normal for thinking these things. That he’d find me weird I wonder those things and that I check on his profile on instagram, just staring at it, blocking and un blocking him. I worry that maybe he doesn’t think of me anymore. And he just. Doesn’t care. I feel like an older version of him would say I’m being too much, that I’m overthinking to so many extents that even tho we are broken up, he’s single and so am I and I shouldn’t care this much about it. But I do. And I’m sure it’s because I’m still in love with him. Even if I’m mad and upset still.