I still think about the video I saw on my boyfriend's phone..

My boyfriend and I have been together for 2 years, but I can’t get over something from the start of our relationship. I accidentally saw a sexy video of him and his ex. Most of their stuff was deleted, but one video wasn’t—and it’s stuck in my head. I can’t unsee it. Even now, sometimes I feel disgusted thinking about it and avoid being intimate with him. Pls help, idk what to do anymore