Story from /r/relationships

First thing, sorry for another break up post, but like many others here I don't have much of a social support net outside the internet.

I am 30/M and she is 29/F. We've been together for 6 and a half years, living together for over 4 years. She's the first woman I've ever loved and she broke up with me today and it fucking hurts.

On Thursday we both left for separate trips over the weekend. I went with my dad and brother to DC from friday to Monday, and she went to hang out with her Mom and Sister in upstate New York for the weekend.

Red flag #1 was that she lied to me about the trip, telling me she was going to her mom's. I found out one way or another that she actually went to visit her old abusive ex and she apologized a lot and told me nothing had happened with him or would happen with him.

Red flag #2 was that she barely talked to me during the trip. I called her once a day and she never picked up the phone, and she barely answered my texts. Eventually it comes to Monday night and we are both supposed to be home (we lived together at my apartment), and she doesn't show up, telling me they stopped at his parents house and that he didn't want to drive her home and drive back alone (it was 1 am at this point, I got home at 12:30 am, she was about two hours away). I ask her if she needs help and ask to talk on the phone since we hadn't talked in like 4 or 5 days. She refused to take my calls. Flash forward to today, she calls me and breaks up with me. Says she didn't expect to still have the feelings for her ex and that she felt our relationship had been going down hill for a while, and that she didn't want to try harder to fix it. She told me she slept with the guy over the weekend and she wants to try things out with him. She's coming over tonight to give me the ring and to get her stuff out of my place.

We had planned to get married next year and were going to buy our first house together in the fall as well.

I have read enough break up threads to know what to expect. I already deleted her number out of my phone, and blocked her on other social media.

I am in pain, it hurts so much to find out that someone you loved so much betraying you like that. I gave her everything, she was my everything and to find out that I didn't mean anything when she slept with her ex is soul crushing.

I'm really hurting right now, will it get better anytime soon?

TL;DR: My Fiancée ignored me throughout the weekend and lied to me about visiting her Mom and Sibling. It turned out that she was actually visiting her ex instead. She called earlier and broke up with me and confessed that she slept with her ex during the weekend and that she still has feelings for him and wants to get back together with him and here I am crushed and heartbroken beyond repair.