Anyone in a relationship ever get an urge to talk to someone they shouldn’t be?

From time to time

For sure, when I was in a monogamous relationship I really struggled with fidelity in general, including talking to people. Generally though I find I often have a hard time not doing things that I feel I "can't" do, no idea if thats related to OCD or just me though lol

I have in the past, it always absolutely destroyed me inside. Being honest with my partner did help to alleviate some of that guilt, but preventing the behaviour from happening to begin with is ultimately the goal. So, even though I'm in an open relationship now, if I feel like I'm really struggling with crossing a boundary, I will talk with my partner about it; he knows I have ROCD and that it's not a reflection of my feelings towards him so he's pretty supportive, but I also try not to just dump everything on him all the time lol. I only talk with him about it when I can't seem to reason with my thoughts on my own. You could also talk with a friend or something when you're really struggling, if that's easier than talking to your partner about it. But I also know it can be tough when the people around you don't fully understand what you're going through. In the long run though, therapy is probably the best choice, if you can afford it. I'm looking into therapy for my OCD specifically right now, and I'm hoping it'll stop me from getting into crisis situations like this in the future. Maybe it'll help you too :)