im having horrible rocd and need advice

I’ve just recently found out that Relationship OCD is a thing. I feel like I relate but it also feels like relationship trauma. I’m in a fairly new relationship and I keep telling myself that things are going great, we are good, he cares for me, but does he? There’s this unbelievable amount of self doubt that sits in me because of what my ex did to me many months ago. I kept getting told that I do too much, i smother, need constant reassurance, then got told that I don’t care enough, the things I do aren’t enough and that I’m not enough. I feel like I am waiting for the day that I get broken up with because of these “problems” just so I can be proven right at the fact that I should be considered unlovable. I go through this every month around my period because I get so emotional and nervous that I stress over the idea that he doesn’t like me. How does someone continue a relationship with Relationship OCD? How do I explain it?

Sometimes I get really upset with my boyfriend and I can’t tell if I’m not having my needs met or if it’s my ROCD questioning things. I can’t express that I’m upset because he rlly doesn’t understand what is going on in my head and most times I bring it up it’s turned into an argument. It is really frustrating does anyone have any tips on deciphering this stuff or dealing with the upset feeling/ bad thoughts (IE: “He’s cheating on me and that’s why he’s not texting.”) (IE: “He’s talking like this because he just doesn’t love me, and he’s not attracted to me. He clearly wants to leave me but doesn’t have the heart to do it yet”)

Hi I don’t know but I’ve being having so much stress in my relationship with my boyfriend and I feel like I’m upset at him with small things and taking it out on him like when he looks at other girls or when he repost things with girls it upsets me and changes my mood and people tell me to talk about it with him but I don’t know how to talk to him about it because I don’t necessarily know how I feel I feel mad and upset and I feel like crying but I also just can’t express how I feel and I don’t know what to even say to him to communicate how I feel I found this app by googling”how to feel more stable in my relationship” I feel like I’m not in a relationship sometimes and I just want everything to work out with him but I don’t know what to do I wanna feel like all those relationships you see and feel loved and want to have a future but I don’t know how to get there