<human>: Give me the gist of the text in a nutshell

Was with my ex for about a year and a half, and we fought a lot but mostly it was pretty good because we like each other as people and have a lot of common interests and had really good sex. But one of the biggest things we fought about frequently was this guy she met on skype and would spend A LOT of time talking to, for most of our relationship. Recently found out that she got with him about a week after our breakup 2.5 months ago, and he is visiting from Texas today. Feeling angry and shitty and a few other things.
<bot>: ex is with a guy i hate, and is probably sleeping with him now and not sure what to do to not have a freakout