<human>: So, first off, my week was already going terrible. My little bunny died from surgery and it was awful. My SO and I have been together almost 3 years.

The next day, I found this out. I was in his room alone and went on his computer to go on my facebook. He was still logged in. Since last year, I had been wondering what was going on between him and these girls he was strangely close to. I found exactly what I was afraid of and looking for. He had been messaging, skyping and texting like 4 different girls and flirting and bascially telling them he liked them. Things like they were beautiful, cute, pretty etc. And calling them little nicknames like "sunshine". Talking about their bodies and especially their asses. Telling them that he didn't care if I got mad about them. He hardly mentioned a nice thing about me. 

I feel like I just don't know him now. I trusted him. He told me I was crazy for months last year when I told him that I knew something was going on. And now I know the truth. He tried to act like he didn't know what I was talking about at first. But he sure as hell knew. The pathetic thing is, all of these girls are in different states far away from where we live. Some being 2 years younger and another being up to 3 years older I believe. 

He craved some type of attention and it sickens me. He said that he was lost and he never liked them or loved them and none of it meant a thing to him. He claimed he forgot that he even did that. I was there for him for everything even though he treated me like complete shit all last year.

Can you summarize the given text in a few sentences?
<bot>: My boyfriend emotionally cheated on me for months and I just found out a year later. I'm extremely upset but I told him we can work things out. He begs me not to leave him.