Did I cheat ? Was I wrong?

Terrane
Me and my man have been together for 4 years now and the attention he gave me at the begging of our relationship has changed.  Going into our relationship he knew I liked girls we talked about 3sums and my emotions for females all the time but we never went forth with anything. Living together about a month ago I broke up with him because I felt he put everything before me work , school , his mother and his sisters and that was cool but when he came home at night there was still no me time . He would spend most of his nights on the couch and even when he got in bed he didn't wanna cuddle at night or be touched. He Blamed  all his responsibilities for not having time for me , so I decided to move to the other bedroom. A few days later I found myself coming very attracted to this girl at work and the killer part about it is that she was a stud. I approached her we started talking and texting all the time . I let her touch my but a few times and we hugged a lot . When we texted they were exclusive. I sent her a picture of me in my underwear from the back and the touches she gave me I felt tingly inside. I told her everything. I even asked to kiss her, to cuddle with her, to go out with her and so on .He saw the texts and found out about everything. He's furious with me . What do you guys think ? I felt abandoned but I didn't go looking for her she just came and now it's destroying my relationship even more. To top it off everything we went through doesn't  matter anymore. The only thing he wants to discuss is her but what about how I was feeling before her ?