Is this forgivable?

Three years ago I went out a night out in town with friends, at this point I’d been with my girlfriend for three years. I was in a club when I noticed a woman kept trying to dance near me, so I kept moving away. Eventually she came up to me and was all over me, saying I’m gorgeous and how much she wanted me. I told her I had a girlfriend but this didn’t seem to matter to her. I tried getting her to dance with one of my single friends but she wasn’t having it. I was very very drunk at this point but I remember this only lasted about 15 minutes of the night. I went to a different club after this and she didn’t come with us.

Hours later I was woken up by my girlfriend who was very angry. I was at home in bed. I’d fallen asleep with my phone on my chest and when she’d gone to put it on charge for me, she saw I had Snapchat messages from that woman. I actually have no memory of giving her my Snapchat, I thought maybe my friends had given her it as a joke or I’d just given her it so she’d leave me alone but didn’t remember. I tried to explain to my girlfriend what happened but she didn’t believe me as she said in the messages I was talking about meeting up with this woman. She didn’t believe me that nothing physical had happened (I know it definitely didn’t). I seriously have no idea why I would do something so stupid as to speak to her when I wasn’t interested in her. After my girlfriend had seen the messages, I deleted the woman off Snapchat, I felt sick having them there.

Anyway, we broke up and moved out of our house. I was devastated as I truly love my girlfriend.

Six months later though, we decided to give things another go and our relationship has been even better this time round. Not blaming anything on my girlfriend but she had problems with alcohol previously (could be abusive when drunk) and she got sober when we got back together, which helped massively.

Skip forward three years, to today. We moved back in together and are happy, still have our ups and downs but are happy. We got into an argument and my girlfriend said it really bothers her not knowing everything that was said in those messages (she was drunk when she read them). So I did a Snapchat data request to get them back. I won’t lie, I didn’t want to. I just wanted to leave all that in the past.

So we got the messages back. Some of them were missing though, so we couldn’t see everything that was said. They did confirm everything I said was true, that it was her who was all over me and that I told her I had a girlfriend. At first you can see I’m not really saying anything bad but as the conversation goes on the woman says “u wanna **** xxx” to which I replied “I like the compliments haha”. Then after that she was begging me to go to her house and I said the only way I could get to her was by driving, which doesn’t make any sense because I didn’t even have my car or car keys, they were at work and it was 5am! She kept telling me to just get a taxi then I told her I was too drunk to go, so clearly I had no intention going. I know my reasons for not going should of been that I have a girlfriend but I was very very drunk, logic had gone out of the window.

Unfortunately, there was something bad that I said after her talking about how much she wanted me and begging me to go to her house for hours. I typed “Well why don’t you show me” and “you’ve turned me on”. I have no memory of this, up until now I really believed
I hadn’t said anything bad. This isn’t who I am, I’ve been cheated on myself I know how awful it is plus I really love my girlfriend.

Anyway, my girlfriend doesn’t know what she wants now. I have done everything she’s asked of me, I pulled up more Snapchat data to prove this has never happened before or since then. I’ve messaged the woman to confirm nothing happened with us. I’ve let her go through my phone as many times as she wants (this has been hard for me as I really value my privacy) but nothing seems to be good enough. I just don’t know what to do to prove to her this was a one time drunken mistake.