Well, I've got a problem, and was hoping I could get some outside perspective from someone. I'm 27, and my girlfriend is 22, and we've been dating for almost 2 years and living together for almost one year. Yesterday, she found some videos on my computer that had been sent to me in early 2012 or so, I really can't remember. The videos were of a girl I was long-distance friends with, and sexual. I had no idea they were there until maybe a week ago, but for some stupid, stupid reason I just left them there, instead of deleting them.

So, my girlfriend hops on my computer for something totally innocent, and finds the videos in my recent documents folder. She is disgusted with me, which really, really hurts me. I never knew I could feel so awful, and I've had some really serious bouts of depression; bad enough to really contemplate suicide.

Now, I haven't cleaned all the files off of my computer and really sorted through everything since... oh maybe 2008 or so. After she found the videos, she looked around my computer, and lo and behold, I still had both this girls' email and phone number, and probably some other contact info as well. I haven't USED this info to contact her since well before my girlfriend and I started dating, but it was still there on my computer. However, the information that damned me was that I had responded to a "Hey, how's life?" type message from her via text in snapchat... so I can't even prove that it was innocent.

I tried to talk to my girlfriend about it, and she asked me a few questions about when I had contacted this girl last, which I thought I was answering honestly... but when she asked if I had her phone number, I said I didn't, because I had totally forgotten that I had her number, along with all this other information. So she starts screaming at me, saying "You're a liar" and "I'm not breaking up with you, you're breaking up with me", and starts throwing my clothes out of our room into the living room. I tried to explain that everything was really old and that she wasn't a real part of my life now, but she isn't having any of that. I really love my girlfriend, I want to spend my life with her. But I ****ed up so badly. She said she despises me this morning. I keep telling her that I love her and that she's the most important girl in my life, but she just keeps calling me a liar and everything I try to say to explain or get her to talk just seems to dig my hole a little deeper.

I don't know what to do. I'm at a loss. I know I'm an awful person, I'm not looking to see if anyone thinks I made the right choices or not... I know I didn't.
Anyway, thanks for reading, if you took the time to go through that awful mess. I'd appreciate anyone's thoughts or perspective on this situation.