Ocd latched onto a person

Hello everyone. I can't say if what I’m telling you is related to my OCD or not… I’ve been diagnosed with ROCD before and now with SO-OCD. It’s been three days that I’ve been having the thought of my best friend fixated in my mind AND IT DOESN’T GO AWAY EVER. I have the thought of her 24/7 in my mind. I wake up having the thought of her in my mind and I go to sleep having this thought. But I don’t fucking want it. Sometimes I say that it’s just an obsession and that it will go away, but I really hate this. I'd like to stop thinking about her. Has anyone ever lived something like this?