I (34F) snooped through my boyfriend's (36M) phone- Got exactly what I deserve

My (34F) boyfriend (36M) have been together for 9 months. Prior to us getting together he was married for a few years, but he found out she had been having an affair with someone out of state. We started dating through the separation and after the divorce had been finalized. Both of us had some trauma we were dealing with, but I thought we could work through it together. More recently, I'd become concerned that our relationship had become stagnant. I had fallen in love with him months ago, but was too scared to say it. But there was no signs of moving forward in the relationship or growing outside of our normal routine. We'd met eachother's friends and families and he had been with me through some pretty tough personal situations. To everyone looking in we seemed completely in love, but at the rate we were going I was afraid I'd never hear it. I couldn't understand what was stopping us from moving forward.

This past weekend, we were staying at a friends lake house for a wedding. At one point he went jet skiing with a friend, and I stayed behind to start getting ready for said wedding. His phone had been blowing up, and unfortunately my trauma got the best of me, and I snooped. I found exactly what I deserved to find; he was texting his ex wife.

This wasn't just casual conversation. He was sending her things like 'I'm thinking about you' and every time she told him she missed him he replied with 'I miss you too'. I am heartbroken. These were things he said to me. When I confronted him, he apologized. After of course trying to deny everything. I decided to make the hour drive back home and skip the wedding. I was upset and I didn't want to ruin the mood.

Today when I asked him why, he didn't really give me an answer other than he knew what he said to her was wrong. He did however tell me that I crossed a line by going through his phone and he wants to take a break from us for a while. I don't know what to feel. I'm sad that this might be the end, but I'm mad that this has all somehow been turned into all my fault. Don't get me wrong, I shouldn't have gone through his phone. I definitely made a mistake. But now instead of being in the dark about those two making me look like a fool, I know about it.

What should I do? Is this end or is there a way to salvage this? Please help me. Its been a long time since I've been happy, and I feel like I ruined it again.

TLDR: Went through my boyfriends phone. Found out he was texting his ex wife, and now he wants to take a break 'for a while' because he feels I crossed a line.

*UPDATE*

Dear subreddit /relationship_advice,

I want to thank you all for your kind words, your cruel words, the encouraging words, and some of the totally unrelated and weird words.

I know none of you know me, but personally I've always considered myself somewhat of a disappointment. And I'm so sorry to let you know that I've gone and disappointed the majority of you that wanted me to be strong. I tried this morning. To no one's surprise he's definitely done with me, and I am still heartbroken.

You're probably all wondering why or how I could still want this to work. Simply put, it has been my experience that when you've be so alone for so long you will try to hang on to anything that has given you even a glimpse of hope and happiness, because going back to the alternative is so miserable.

I'm sorry to disappoint and let you guys down.

I just wanted to be happy.

-Snuggly_Raptor