Any suggestions on getting over breakup?

Advice needed please: Has anybody ever been in a situation where something traumatic or heartbreaking was happening in their life and struggled with rumination? I know there is like a normal amount that you should process something and cry it out but I don’t know that it is conducive to anything to do that on and off for hours? Wouldn’t it at a certain point be considered unhelpful rumination? And if so how does one stop? Because I’m going through something so hurtful and confusing that I don’t know how to stop thinking about it and the usual distractions don’t work for very long. And idk how important this is but it just happened today so it’s very fresh which makes it even harder to not think about and “figure out” why x, y, z happened. Goodness, I’m sorry if I’m weird or a baby

When my boyfriend and I are apart, it honestly feels like I've lost all feelings for him. I start questioning everything, wondering if I even love him at all. Then, when we're finally together again, the memory of those earlier doubts creeps in and completely ruins the moment. I get so caught up in overthinking and analyzing my feelings that I can't even enjoy being with him. It's like I'm constantly second-guessing myself. The worst part is, sometimes later, when we're still together, I do feel the love. But then the anxiety kicks in again! I start worrying that I'm just faking it because I had those doubts earlier in the day. It's this endless cycle of questioning, doubting, and overthinking, and it's exhausting. I'm really struggling to stay present when we're together, and it feels like this constant cycle is preventing me from truly connecting with him. We have been together for three years and we love together, and I just started feeling this way about a month ago; it’s been almost every day since. One day, I randomly thought about breaking up with him. Our relationship is healthy, especially compared to my previous toxic one, where I was anxiously attached for two and a half years. My boyfriend is very supportive of me. I have talked to him about my doubts and everything I’m experiencing, and he continues to support, care for, and help me through it all. I am very grateful for that. One aspect of my current relationship that I would like to improve is our communication, but we are both willing to work on it together. I often find that my overthinking leads me to question whether I really want to try to fix things or if I’d rather just continue as we are. This creates a constant push and pull in our relationship. Has anyone else experienced something similar? Any advice on how to break this cycle and just be present in the moment? I'd love to hear from anyone who's been through something like this.

My psychologist tells me because my thoughts are based off of facts/ broken boundaries which is why I am having thoughts of am i in love , am I settling , and feeling guilty I should let him go to find someone who wouldn’t doubt him that I do not have rocd. She states rocd is intrusive , irrational thoughts not based off of real facts and I may have ptsd not ocd. He kissed someone else before we were official and he finds a certain type of female attractive that I find disgusting . So I spin about these issues all day long to the point I’m so unhappy with him and had to break up . It’s been over a month now but I’m still severely anxious and depressed The thing is I can’t stop thinking about this 24/7 with severe anxiety and depression and nothing is helping me . Can someone please tell me their thoughts