So I've been with my girlfriend for 10 months now, we met whilst backpacking and ended up doing most of our traveling together. When we returned to the UK we knew we'd have to do a long distance relationship, this wasn't idea for either of us but we decided to give it a try.
The weekend I got back I had a big night out with my friends who I hasn't seen in over a year. We had pre-drinks round my friends house, I ended up so blackout drunk I don't remember leaving he house, let alone the night hat followed. As it turned out one of the girls there thought it would be hilarious to double up my drinks when I wasn't looking, by the time I found out what she had been doing it was a bit too late.
So I wake up the next day with a big hangover and a lot of questions. I call one of my friends, who to my horror tells me I may have cheated on my girlfriend. He says he didn't see it for himself, but was told another one of my mates. So I call up friend 2 who tells me he wasn't witness to the infidelity either, but it turns out this random girl wouldn't leave me alone and was all over me.
Whilst nobody has said outright (I think they realised they could've not told me), I have a gut feeling that I may have ended up kissing her, and right now I feel like the biggest idiot in the world. Do I tell my girlfriend? What do I tell her, I don't even know the full story myself?
I feel so guilty now, it's just eating away and I can't stop obsessing about this incident. I'm seeing my girlfriend in 5 days time so if I was going to tell her I want to do it in person.
Some advice would be great.