<human>: My girlfriend left facebook logged in on my computer. We recently broke up and got back together, with the single period lasting for 2 weeks. I thought it would be funny to send her a message to herself reminding her to log out next time, when I saw that she recently messaged her ex. He has been constantly bothering her, so I wanted to know if he said something that was threatening to her. I accidentally went too far back, and I saw several pictures of them fucking and walls of erotic text, and recently she talked to him about "breaking up with the poor kid." They then talked about his dick, and the conversation dropped. We got back together 3 days after this conversation, when she told me she didn't even think about getting with other guys. I threw up and I can't stop obsessing over it. What the hell do I do?

Summarize the given text in a few sentences.
<bot>: accidentally found pics of my gf and her ex fucking and I cannot get it out of my head, I'm going insane.