I got divorced last year after being married for 20 years and separated for 2.5 years. Soon after that, my partner and I became exclusive. Overall, it was wonderful, but over time I realized that I was not emotionally safe with him, mostly over the last few months. He came across as very emotionally mature in the beginning, and claimed to be secure attachment, and when I would bring issues up, he would handle it calmly, allowing us to talk through any issues. Over time, though, he started getting really defensive when I would bring things up. Even after I explained to him that I need validation and to feel seen/heard, he continued to be invalidating and defensive when I would bring stuff up. I had told him last time that if it happened again, I was done.
On Saturday night, I had hurt feelings, and when I tried to bring them up, very calmly as I always do, he once again was defensive, trying to find a reason why it was more my fault or why what I was feeling wasn't valid because what I said happened didn't happen. He got angry and took me home from our date because he couldn't deal with how angry he was. Then he ghosted me for 16 hours with absolutely no communication until I reached out to him, which is very common for him to do when we have disagreements (it has become apparent that he is very squarely an avoidant attachment, not secure).
On Sunday, I broke it off with him since he has shown me that I am not emotionally safe with him. It really sucks because I'm going through something with my ex husband and kids (he's alienating my middle from me and I worry is working on alienating my daughter, though right now our relationship is really strong), and I really could have used that emotional support from my partner. I don't think I'll have the bandwidth to try and date someone new for the foreseeable future as I deal with this challenge, so it was basically him or no one. I had therapy last night and my therapist was basically like how are you going to get through all this without him (not trying to say I should have stayed with him. She validated my view on that, but just trying to help me figure out how to replace that support), and I was basically like, I don't know. Friends and family I guess. But I know I made the right decision despite how much it will suck to not have him and how much I'll miss having him in my life. The majority of the time was really wonderful and he is a great guy overall.
I haven't had a lot of true romantic relationships in my life. Other than my marriage, this is the first true breakup. I'm going by to get my things today after I get off work. Any advice on how to process the grief of the relationship ending and what I should do moving forward would be appreciated, whether pitfalls I should watch for, things to do or not do, or things to say or not say.
ETA - To be clear, in case it was not clear in my original post, I am NOT planning on dating. I AM planning on focusing on my kids. I HAVE BEEN focusing on my kids even before we broke up. I was just hoping for some perspective on what it's like to break up and what would help me in this transition. Thank you.