Search Results: fighting with parents

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My blonde girlfriend came back from university to visit me and her parents and she found a long brunette hair on one of my pillows.
She was furious about it and thinks I am cheating on her now. I adamantly denied this but she didn't believe me and said she was going to search the bedroom to make sure. I said 'go on then' knowing I had absolutely nothing to hide.

After doing her own female forensics she unbelievably found another two brunette hairs in my room. One dark hair was under my bed and another in my sock draw right at the back.

I have two explanations for this….
1) The hairs belonged to either my mom or sister (both however have been away travelling Asia since mid June unfortunately).
2) The hairs could be 1-2 years old and belong to one of my ex girlfriend's…

I've tried explaining both of these theories to her and she refuses to believe either. She is accusing me of sleeping with one of my work colleagues who has black hair and recently added me on Facebook.
Anyway she went back to her parents house crying yesterday and hasn't replied to any of my texts or calls since. I don't know how to prove my innocence and I am fighting for my relationship here, that's if it isn't already over. I definitely haven't cheated! Please, I need help here. Is she being irrational or would you have trouble believing me too?

So, the one i truly loved, dumped me after more than a year together, saying she needs a break, and she will DECIDE LATER, if she wants this relationship.

It has been a year, LDR due to a one year army service, and I struggled through depression, I lost feelings for her during that long time, but never showed that I did, until she did help me through it, in distance.

She moved to a country that she could be closer to mine, were she could work, and make money, to visit me, while I can't leave mine for a year nor work, and I did appreciate what she was doing, but everything changed the last minute, right before she could come and visit.

Her reasons were that she can't be in a relationship were she's not happy, having doubts, too scared from seriousness, and she knew I took her for granted.
and other uncertain reasons, of course she wouldn't tell me all the reasons, these are just excuses, and I know she didn't cheat on me, but maybe she fancies someone or she lost attraction to me, or she felt better about herself when she started working and depending oh herself, which is good but not a reason.

Maybe I was acting needy, overly attached, while fighting depression and missing her a lot, which made her interpret things the wrong way, that she felt that I was controlling her.. and I knew she started to back away and loose feelings, since we had a big argument (2 months before break up)
cause i was miserable during depression, unsupportive, controlling, over worrying, always complaining, telling her to come visit every while. Yea it was wrong.

Then the way she talked changed, never asks for skype, she complained she hates the way she felt towards me, it was like ups and downs, and i felt she was sometimes testing me, and my neediness. She changed, I know she did loose attraction.
And there is more details that happened

I haven't bad mouthed, yes i did a mistake talking to her parents and her twice after breakup as an apology.
what to do now?