Regardless if you stayed or not.. how did you get over being cheated on? What helps?

My biggest issue is trying to imagine everything that happened.

When I see sex scenes on tv, I get triggered and imagine my boyfriend and the female he cheated on me with. It makes my stomach turn.

I guess I just sit here and think about the exact details. Did he kiss her the way he does me? Did she look better naked than I?

The only reason I try to imagine it is because my boyfriend told me it happened. I told him to tell me every detail. He said what he could. Then I talked to the female separately and asked her to please tell me what happened. They both had a story, it was relatively the same. They went for coffee before. So now every time I see that coffee place I hate it. I try to imagine the story they told me in my head. I hate it:

How did you over come those feelings? What did you tell yourself?