Anyone having unnecessary and excessive doubts on their girlfriend/wife or boyfriend/husband being unfaithful to them?

I know he’s not cheating on me. He’d never do that and, as hard as I try to tell myself “he’s proven already that he’s not” and show myself all the signs of commitment and dedication, I still have that fear. It’s eating at me and ruining my relationship. How do you guys get over this? If my brain were true he’d have been cheating on me for months in ways that aren’t even possible. It doesn’t make sense if I think about it logically but it seems like when I do, I create in my head more ways for it to be logically true. What is your advice? How can I stop self sabotaging?

I'm struggling really hard with relationship obsessions. Do I really love my partner? How can I know? Am I really just faking it? That kind of thing. It's making my life and relationship a lot harder than they need to be. I could use a few helpful coping mechanisms, trying to move away from less helpful ones like chasing reassurance.

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.