Hi everyone
My 1 year long relationship has turned into something that makes me really sad all the time.

Well, to begin
She really has a problem with my exs. She always browses my history, I caught her few times in doing that. I saw that she was trying to log in into my facebook account several times. She also found some of my pictures with an ex and made a big deal of it, even though i destroyed them as soon as we found them. She was also very mad when she found in my history that I looked an ex's facebook profile twice in last 12 months (and that is only because my best friend wanted to see something about his gf, her sister). So I didn't talk to her or anything we just looked at something. Even though i explained it a billion times she was so mad and I ended up apologizing and feeling bad.

I never gave her any reason to do such things, I never even thought about idea of cheating her or something. I had opportunity to cheat on her several times but every time I didn't and ended up explaining those other girls how much I love my gf and would never hurt her. (and some of those girls were my exs)

With the next I am not so proud but I think I don't think that I shouldn't have done that.

With her being so obsessive with exs, messages and pictures, I started thinking about it too. Few weeks ago I was alone with her PC and couldn't resist in looking at it. I have found screenshots of her conversations with her ex which happened around 3 months into our relationship.
They seem to be fighting all the time. But there are also hearts all over the conversations, and it seems like they spoke to each other all the time. But the fact that she took screenshots, and still has them next to my pictures really makes me think about it.

She always talked about how much she respects me and how she and all her exs are completely over, she is 100 percent into this relationship and has got rid of all the things and deleted everything she has from past relationships. Never cheated on me or anything... blah blah... I never looked into anyone's PC history before, I found it completely breaking into someone's privacy. But after I found this I kind of felt that I needed to do this. And of course I found his facebook profile in her history, she searched for him even few weeks ago. I feel bad for looking at it as I never really broke into someones privacy before but I really had to it now. But I am really not proud of it.

Until this we were perfectly happy. Planned to live together in a few months. Even talked about getting married. Blah blah. It all seems ****** now. I mean if she had something with him while we were together for 3 months there is no way I could stay with her any longer. But yet again we are so close and I don't know what would I do without her.

Now, I still haven't told her about this and I am really afraid to bring up this topic as it may lead to our break-up. Or should I just try to forget it because there is nothing we can do anymore... It happened like 9 months ago.

I don't really know what to do, so any help would be good