ROCD? Please help.

So I've been dealing with HOCD for the past 4-5 months, and things were starting to look up. But recently my fears and obsessive thoughts have shifted to something else and that is my relationship with my girlfriend. I have been dating my girlfriend for almost 8 months now and I love her very much, but for the past few days my mind has been thinking the opposite. Now my girlfriend has dealt with depression and has mood swings and somewhat of a short temper. This doesn't affect her 100% of the time, however. Recently, she outbursted at her mom while I was on the phone with her for what seemed like no reason. Now this is usually a common occurrence, but I always think to myself "Is this just her short temper or is she being greedy and trying to command her mother 24/7?". And my mind picked the second option this time. Yes, I will admit that I do get upset with her or frustrated with her sometimes, but I can get over it. What's been happening recently is that it's been forcing every little thing that she's upset me over into my brain, and my mind is basically repeating "She's a bitch, break up with her" and the thing is I don't. I really don't. And I was afraid to even talk to people about it because I know that they'd say "oh well maybe she's just not for you". I love her and she loves me and it just seems like I'm getting worked up over these little things. Our relationship has been working out great and she's made me so happy. My mind just keeps forcing these thoughts into my head, I don't want these thoughts. And I know it's my OCD. Everytime I say I love her, it doesn't let me love her. And this has been bringing back my HOCD and almost tying into it, which just making things hell for me.

I'm sorry if that was confusing, I'm just desperate for help. Thank you