Should I contact my ex again or just leave it ?

So I (18F) had a relationship with my ex that lasted around 2 months, and I honestly don’t know if I should reach out again or finally let it go.
He asked me to be his girlfriend on Valentine’s Day after about a month of knowing each other. I already felt unsure because of his past not just what he did, but the type of people he used to be around. It triggered me, and even though I knew that was something I should’ve communicated better, I didn’t.
At the same time, he was really sweet in the beginning. He wrote me a long letter saying I was the best thing that ever happened to him, that he’d change for me, even go to therapy for his aggression issues. But despite that, we argued a lot. Looking back, I feel like I couldn’t fully be myself, and I also wasn’t very affectionate because I was still somewhat stuck on my previous ex (which I know was unfair).
Things got worse when I went on vacation for two weeks. He became distant, smoked weed every day (which I had already told him I wasn’t comfortable with), replied late, and even turned off his location. When I confronted him, he said I never text first and leave him on read during arguments which was partly true.
Eventually he suggested breaking up (then changed it to a “break”) because he said he had too many personal issues and wasn’t in the right mindset. I didn’t want a break where I’d just be waiting, so I told him to contact me when he had his life together and blocked him.
But I kept checking his socials and saw him following a bunch of girls, which made me feel like the “I need to focus on myself” thing wasn’t real. We ended up in contact again multiple times, but it was always inconsistent. He ignored messages, avoided meeting up, and when we did meet, it was awkward and he barely took accountability.
He also said he has borderline personality disorder and that he distances himself from people sometimes, but I felt like he was using that to excuse certain behaviors (like following lots of girls, not communicating, etc.).
We tried talking again after that, but it went nowhere. He kept saying he wanted me but couldn’t guarantee he wouldn’t hurt me again. Communication was terrible (like one message a day), and plans to meet up kept falling through last minute.
The final straw was when he ignored me again, and then my friends went up and confronted him and his friend said something like yea u don’t get it f\*\*\* her” etc. After that, I blocked him again. That was about a month ago.
Now I’m here wondering if I should reach out again or just leave it as it is. Part of me feels like there were real feelings, but another part of me feels like I was never really a priority especially now at the end and that nothing would change.
He also reposted a video about a girl from 2025 so idk if he already moved on or not
So… should I contact him again or just move on?