Does OCD cause you to overanalyze your partner's behavior and intentions?

I’ve been with my boyfriend for 3 years and he is an absolute angel. All throughout the relationship I would have nightmares and intrusive thoughts “what if he leaves/cheats”. And he would reassure me and treat me like the world revolves around me. Lately I’m realizing this was actually ocd and not anxiety as I had previously thought. I would get paranoid if he didn’t check his messages for a couple hours, I’d get anxious if I saw an ambulance heading toward his street while I was driving, I would ask for reassurance that he loved me constantly. Bear in mind, I have no reason to have these fears. My boyfriend is my best friend and has supported me through thick and thin and he’s amazing. One time a couple months ago I was being a bit snappy with him one night and I had the thought “only people who don’t like their partners are snappy with them” and it just stuck. Now I struggle with intrusive thoughts about my own feelings, do I love him, do I miss him enough, is my relationship going to end because this couple on social media broke up. I could deal with the thoughts about his feelings because he is so so good about making me feel loved but now I’m stuck in this constant guilt loop where I question my relationship for no reason then get anxious and feel guilty for even thinking that way because I think I’m manifesting it. Was wondering if anybody else in a healthy long term relationship has had this happen to them and how you talk yourself down :(

Although being diagnosed with OCD nearly 2-3 years ago, I’ve just recently found out more symptoms that were related to it, ones that I had no idea of. For example, reassurance-seeking into my relationship with my boyfriend. Him and I have had a lot of issues over the past year and the stuff he has done made it worse. Even though he’s trying to change for me, I can’t help but feel like he’s lost my trust. And I know this isn’t true because within every promise he makes, I trust every word. I hate asking for his reassurance because I can’t control it at ALL. And no matter how much he tells me that he’s not mad and that I didn’t do anything wrong, it never feels like enough. He tries to cheer me up and deal with my mood swings, but I get angry and upset so easily that I start to feel like I’m ruining his life. I don’t want to ask for his reassurance on it either.

I think I have relationship OCD. I will be doing great with my boyfriend then out of no where I get this intrusive thought that he thinks other people are attractive and has a wandering eye for others and I need reassurance immediately. And when he gives me reassurance, I think he’s lying. After like an hour of back and forth repetitive conversation I feel better, then the next day it happens again. Every. Single. Day. I freak out and blow up and need reassurance. I can’t tell if I’m getting these thoughts because they are true or because I’ve been with someone in the past who has cheated on me so I believe that all people get these thoughts. I’m so ready for a cure. Does anyone know what to do? I don’t want to live with this