3 weeks ago I broke up with my partner of 3 yrs. It was heartbreaking--one of the hardest things I've ever done, but I felt that he left me no choice.

Before we moved in together 2 yrs ago I found out (through Facebook) that he was cheating on me with another woman while away on a temporary job. I told him then, that it was over, I did not deserve this, and I was not going to stand for it and cut him off cold.

5 weeks later I heard from him and he was all apologetic, he was sorry, he loved me and didn't want anyone else. He was going to be away for another 6 weeks, so we used that time to talk and work things out. When he came back we moved in together and up until recently were very happy. He was living up to his promise to "make it up" to me--I saw no indication that anything was going on. Everything seems to be going great.

Then in February I found a text exchange with another woman--he was asking her to "write him a love letter before he went to bed so he could dream about her". She responded that she'd sent it to his email. I didn't want to look any further. I confronted him about this and after initially getting mad for looking at his phone (it was on the table when the message came up and I saw it....) he said he was sorry, that it didn't mean anything and it was just a "distraction". I asked if he was going to end it, and he said he would.

I don't know how stupid he thought I was, but after that he put or changed the passcodes on all his devices and began hiding his phone from me. I knew this was still going on, but whenever I asked he told me it was over. If I asked to look at his phone he started yelling that I "was obsessed with phones" and I "needed to stop this". Need I say we just started fighting all the time? Finally 3 weeks ago I got the phone bill and decided to investigate further....he had calls/texts/photos back and forth with this woman multiple times every day. I confronted him again, and told him that was it, and the next day kicked him out. 

He did say he was sorry, but I was in full furious mode and right then just wanted to get away from him. Never discussed what the problem was, or trying to talk about it and maybe work it out. I was hoping he would say something like that, then maybe I wouldn't have left, but he didn't--he just said "maybe I'm not meant to be in a relationship" and that I'd never trust him again (to which I responded "whose fault is that? and he acknowledged it was his)

I haven't spoken him since a day or two after the breakup. I blocked his phone calls (but he could easily call me from another # if he wanted to). I'm having his emails sent directly to my "trash" folder (which I admit I check a few times a day...nothing)

Was I unreasonable. Should I have given him a chance to work this out? Other people have worked through infidelity, and this was only a cyber affair--he said he's never met the woman in person, and due to the logistics I believe him. Did I over react? Was it unreasonable to kick him out without even talking about it? I was just so angry and so hurt.....