How can I manage intrusive thoughts in a new relationship without anxiety?

hi so i am pretty new to discovering ocd and trying to figure out why i am feeling the way i am feeling. i’ve never been diagnosed with ocd and honestly thought my anxiety was just super bad until it started affecting the way i saw my relationship. i’ve never had this bad of anxiety in my relationship and around november of last year is whenever i started noticing the cycle of repeated thoughts of “should i break up with him?” ive been with my boyfriend for almost two years. yes we’ve been through our ups and downs and our relationship has overall been such a beautiful relationship (super healthy compared to old ones) we love each other deeply and communicate and just overall find ways to help improve our relationship healthier and i’ve had a doubt here and there throughout these years but since last November i started feeling disconnected with him a little. i started to question sometimes if i really loved him. other times i told myself and asked myself if i should break up with him. if we really loved each other. i started focusing on his features a lot more. to the point where these thoughts around him made me feel so extremely uncomfortable. i’ve done all my research trying to figure out if I love him or not and trying to find reassurance and other people stories to see if they feel the same way I would also see how I feel whenever I was around him and it got to a point where I overall just felt very disconnected with him and a lot of different forms. I sometimes will forget about these thoughts and I will go out through my week throughout my days and I won’t even think about them and then something good will happen actually and it will trigger that immediate thought or sometimes we’re not even doing anything we’re just hanging out and being together and that will trigger the thought of wanting to break up with him and it makes me extremely uncomfortable and it makes me panic gives me anxiety and it just stresses me out because I know it’s not true, but my brain has tried to fully convince myself it is. I was doing really good and I figured out how healthy I wanted this relationship to be recently and because we’ve been so stressed on talking about our relationship and moving on even further and growing together, it started coming back and now I’m very very anxious again. I also have this type of anxiety of obsessing over things such as my health. When it comes to my gut health to my skin I have a very bad habit of having perfectionism not only within, my body face and everything around what is myself. I have a lot of anxieties, and I always thought it was just very severe anxiety until when I was researching why I was doubting my love for my boyfriend I heard of ROCD and I was super curious to know if I even have OCD, I brought it up with my psychiatrist and she doesn’t think that I have any. I have so much anxiety over this I feel like it’s physically and mentally controlling my body from how much it’s overwhelming me. I don’t know what to do. I keep convincing myself it’s not even RCOD and maybe I truly don’t love him but I have no other proof or feelings that that could be true. It’s just a thought that circles in my head and no matter how many reassurance I give myself it will come back within an hour, if someone could please give some advice I will have my own therapy session here soon and I’m very excited to know how I can overcome this

In my past relationship that lasted for years, I so many obsessive thoughts and intrusive thoughts that I listened to like “you don’t really love him. You’re just pretending”. I told him when I would have these thoughts and I could tell that this was not helping our relationship when I would tell him, but the compulsions felt better when I did it. We eventually broke up, and even though he swore it was not because of my ocd, I can’t help but think that I scared him. Flash forward two years and I’ve met this other man. I am worried that my intrusive thoughts about relationship worries will get the best of me and I will end things before they even get good. I think I am more prepared for this time but I’m still worried. I wish I could just stay in the moment and not catastrophic everything.

I've recently started dating someone. I like him very much, and I know he feels the same about me. I have always been unlucky in relationships, so this is something brand new for me. I haven't told him I have OCD. It feels like a rock in my chest. I feel like I'm keeping something big from him and I feel so guilty. I don't know what to do. I don't want to drag him into my mess, but I don't want to break his heart and mine. I have a chance of happiness for maybe the first time and I feel like I don't deserve it. I feel like I'll ruin everything. What should I do? Please I'm desperate.