I really need help with jealousy. Any one that can help!?

You know when you have weird thoughts about a coworker and because you have OCD these thoughts really stick and you panic and feel sick? Yeah that’s me and I’ve struggled with having intrusive thoughts about my coworker and now he just got in a relationship with my coworker and my intrusive thoughts are WORSE I thought they would be better? And initially they were because I was relieved that he couldn’t be weird with me now because he has a girlfriend. But this is the thought that i cannot get over- my OCD is like you’re jealous that he doesn’t like you and he’s not with you instead and i envy this girl he is with. Why the fuck am I having these thoughts while I’m in a healthy relationship and love my boyfriend to DEATH- like I know he is my forever. I couldn’t look at him today because I’ve been obsessing over this thought I’ve had in work and now I have to find a new job I hope no one will judge me for these thoughts or maybe someone has had this weird thought before? :(

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.

I'm 18, and been in a relationship with my man for nearly 2 years. I started living with him around 2 months ago, and all I do is think about if he's cheating. We were long distance for a year and a half of our relationship, maybe seeing eachother once every month or two. I decided to move in with him, and ever since all I can think about is if he's cheating or watching porn. When he's in another room I think he's doing something wrong, I have to check on him every ten minutes to ease my anxiety. I didn't have this problem before moving in. Granted he has talked to some girls on his phone, even having his ex on his phone (didn't do anything bad) and he is porn addicted though he is getting better for me. It's gotten so bad I want to leave him. A couple days ago I broke up with him and it absolutely broke my heart, I couldn't bare it so I gave him a month to show me he can do better, and for me to work on myself. If I'm still unhappy with us I'm going to leave. I love this boy more than anything. I'm scared to be without him, this is my first real relationship. At this point I refuse to even sleep until he is sleeping. I don't want to start over, I don't want to leave him, but I really can't take this pain it's causing me. It's all I think about. I've convinced myself so many times that he's cheating, but I know he wouldn't. I question whether it's anxiety or intuition. Maybe I just know deep down he really is cheating and I just don't want to believe it. I don't know. I don't think he would do that, but at the same time he's really into women. I hate that he looks at other girls in a sexual way, it bothers me so much, and we talk about it often, but with it being an addiction it's difficult. He has gotten a lot better since we have talked about it. He understands I have an issue and is usually happy to talk about it over and over and promise me over and over that he's not cheating. He allows me to have his phone whenever I want and everything, I have no reason to think he's cheating, but I can't get over it. It's not fair to him either. How do I deal with this? How do I stop hurting so much?