<human>: My girlfriend of just about 2 years and I have on and off again gotten in to arguments and drunken fights [NOT physical] about various things over about the past year. They always started with something minor, and would escalate because I was insecure and petty about a few things that I now realize were really stupid of me to use to escalate a fight with. That being said, I'm COMPLETELY over those things.

About 2 months ago, we got in to one particularly heated argument that led to us breaking up. Over the course of the next 2 weeks, I ended up being very sad, feeling pathetic and lonely, very drunk, and sleeping with someone else, ONCE. I woke up the next morning instantly in tears, full of regret and pain and disappointment in myself. 

 There wasn't nearly enough time that had passed for me to sleep with anyone and I wished so much I hadn't done it. We actually had a date set to "talk" in the next week. In my mind, this "talk" was going to be a completely dissolution of our relationship, when in fact it was going to go the complete opposite way (according to her).

The morning I woke up after sleeping with this other person, I probably shouldn't have, but I told my girlfriend everything, I couldn't live with it not being said, not to cause her any pain, which it definitely did, but if there was a chance of us getting back together, I couldn't keep it from her. I truly, truly regret everything about it.

In any case, we got back together on a sort of trial basis, and things are going just okay. I know a certain level of trust is completely gone and can't be fixed, but from the bottom of my heart I completely regret everything about it and wish so much I hadn't done it. Is there any way to prove this to my girlfriend to regain any semblance of trust? I'm pretty sure I've ruined a relationship that was probably going to be the best and last one of my life and I'm having so much trouble reconciling it in my head.

Can you give me a shortened version of the text?
<bot>: slept with someone else on a 2 week break up from my gf; instant regret and dissappointment in myself; told gf; we're back together, but still trying to work on things.