I saw pictures and that hurts much worse than texts. The reality of it hurts. After a while those mental replays will be less and less. It's one thing to think about it with your intellect and another thing to see and hear the actual event. It's harder to see and hear a tragedy than to read about one.
When your mind brings it up gently tell yourself, you feel hurt and sad but none of this was your choosing. Their choices. Theirs. Yes they were selfish. Yes they hurt you. Now you are choosing your healing. Your health. Your strength. You choose. Tell your brain something positive after you regain calm. If you heart gets going, do some exercises. Get rid of the stress chemicals. You are doing something healthy for yourself.
If you have an upsetting dream, tell yourself you are processing the pain, you are trying to be whole. Be kind to yourself. Gently turn away from the visions and focus on something soothing.
I would think about the times they climbed hills together after work, dinners out, hotel rooms, conventions, working together on movies...on and on. Those lousy sex pictures hung around taunting me. Pictures of them in costumes on websites.
Your brain cries why why why? It's selfishness. That's why. It's all it ever was. A me first mentality.
So when the thoughts come up you say to yourself, OK, there's that but I am putting myself first. I am doing something for me. Then you decide what that is and give your mind over to that thought. I'm learning something, I'm enjoying music or a show I like, I'm eating healthy or exercising, I'm cleaning my car, I'm buying something nice to wear....whatever it is you give your brain an alternative.
The thoughts still come. Your stomach still hurts, but you know it's a process that will be less and less and you go easy on yourself. I liked to notice what would bring the thoughts on or when they were likely to arise. Notice them and then turn your attention away to something healing. I used to 8magine I was sending that thought out into the sea or into space. Letting it disintegrate. Find a smell. Something you like. Smell that while you look at an image of something that represents healing for you. I had a picture of a landscape I loved on the door. I'd smell that fragrance and concentrate on the image or hold it in my mind in the shower while I inhaled the scent. You can help your mind through repetition.