oh i have been in your EXACT shoes SOOO many times. my then boyfriend (now husband) has said SO MANY things in our 4 year relationship that if my OCD was on high alert it would send me spiraling. FOR example, I was super aggravated with my friends son because he was being a BRAT and I hated hanging out with her with him around, I told my boyfriend and he said " I guess we should just kill him huh?" OOOMMGGG I was manic for 3 weeks thinking I was dating a child killer... none OCD me sees it as an off colored joke and nothing more. He has said other things that I thought were " red flags" but when you can back up from OCD, this man saved a kitten last week that is now so in love with him its not funny. He is a hero in my world, he saves me daily. You have OCD, I KNOW how you feel, its hard. it runs like a broke record in your mind. its going to SUCK but the ONLY way to beat it is to let it run its corse and to focus on doubling down on the relationship. DONT try to find ways to convince yourself he's a good guy ( that's a compulsion) DONT try to justify what he said ( that's also compulsive) basically ANYTHING you might do for relief? is compulsive, so dont' do it... allow yourself to be uncomfortable. tell yourself " meh, maybe he's good, maybe he's bad, it actually doesn't matter, I choose to be with him, so he is good enough to me" we are all a little off sometimes, we all say things out of left field. Just as our thoughts don't represent our entire self, a few random weird things a person says do not represent them as a whole person. NOTHING is ruined.
IN THE MOMENT, do box breathing ( look it up on youtube) center yourself. find the anxiety in your body, where ever it is, ( for me it hits my knees, my chest, my palms, my stomach) and really FEEL it, you will probably notice that as you focus on it, it actually looses power pretty fast. say your mantra " maybe so, maybe not, I don't care, I choose good" and go back to what ever it was you were doing when the moment hit. you CAN get past this. i married the man I thought was a walking Red Flag WHEN I had OCD, but when my OCD let go, I saw he was the biggest green flag ever! don't let OCD take away your choices.