How do i stop feeling like this?

6 days ago I ended my (25f) near 2 year relationship with my boyfriend (23m) that i loved very deeply. We have been no contact since then as I have blocked him on everything. Over the past 2 months, he consistently chose to put our relationship on the back burner. He would not make time for me and would usually only invite me over on weekends after he was drunk and done with his friends. When he wasn’t drunk he was just distant with an attitude. He didn’t like cuddling, touching, going on dates, and never said yes to me asking to hang out. It was always his terms and almost always when he was drunk. He didn’t like my feelings about it and almost always told me it wasn’t like that or necessary.

Eventually I found that (after multiple conversations before) that he had liked another girl’s photo on instagram and i just realized i couldn’t take this anymore. I had told him that he didn’t have room in his life for what I wanted and he responded with some extremely hurtful things that I just can’t come back from. Now, I had my own issues i was working through and taking accountability for, such as my anxiety which i’ve gotten medicated for.

I was sent screenshots yesterday that he’s now on a dating app requesting everything I begged for from him. It had been 5 days. I’m crushed and honestly feeling really insecure. This is so painful and I just don’t know how to put this out of my mind and move on. I feel absolutely disgusting and that there is something fundamentally wrong about me as a person. I’m so ashamed that Ive let this situation make me feel this way. how do i stop feeling like this?