<human>: Upon discovering old prom pictures, I made the dumb decision to send a snap to my ex boyfriend of what I had just found. This soon lead to the obnoxious routine texting that we have. He tells me how pathetic he is and that I was just "dumpster diving" because he is trash followed by reassuring text messages of me telling him that he was/is good/attractive person, but not this time. We began talking about our breakup and how I said a lot of mean things to him when it happened.  I told him that I was just upset with him because I felt like he wasn't there for me when my brother did what he did.
My exes response? What did you brother do?

My 11 year old brother tried to kill himself and he didn't even remember.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: my ex boyfriend and I broke up because he wasn't there for me when my brother tried to kill himself, three years later he doesn't even remember that it happened.