<human>: Can you provide a brief overview of the text?

Hello! 
Long story short:

We met on a dating website, we added each other on FB but never talked again. A year after that, May 2015, he talks to me and we talking occasionally. During July 2015, we were already talking everyday, but I was going to get my wisdom teeth removed, had some complications and I was two weeks out of all social media (no internet in my house). Starting August 2015 we resume talking and we go out for the first time in September 2015. In October 2015 we became an official couple. 

I was always a bit insecure because he was engaged to his first girlfriend. She dumped him. And I was having trouble believing he was truly over her because he had pics with her, still had her as a friend in FB, had her whole family, etc. We resolved this. Then I got upset when I knew he had had sex with her and another girl before her (his first time). He has been my only sexual relationship and I was feeling a bit bad because I was his third. Little did I know I was his fourth. 

Now, June 2016, he confessed there was someone else "before me". He told me they met playing soccer and the girl kept insisting for him to go to her house and watch a movie with her. He agreed and went. They had sex in the couch. He stopped midway and left. She began sending pictures of herself cutting, texting him and calling. He "wanted to help her" so they agreed to meet the next day after their first time. They had sex in his car. This happened during those two weeks I was out of social media. He said that he felt bad with himself and that she worked with his mind by saying: "There's nothing wrong with this." "Just go with it." "Don't be stupid." 

I stopped talking to a boy who was interested during those weeks too. And he had sex with someone else. 

I feel cheated on, betrayed. Am I right?
<bot>: He had sex with someone while we were getting to know each other, we talked everyday except for two weeks I was sick, is this cheating?