<human>: Can you provide a brief rundown of the text in within 3 sentences?

This actually happened two weeks ago, although it was today that I learned of the effects it had.

I had been in a weekend relationship since February. My now ex girlfriend lives some 130 km (80 miles) away, so we visited each other each Friday to Sunday. She came here two weeks ago, so I changed the bedsheets on Thursday. I hadn't used those sheets for almost a year, when I was still living with my last girlfriend. I didn't even think about it and slept happily in those sheets that night.

The next day my girlfriend arrives, I pick her up, we have dinner, talk a bit and go to bed at night. Action begins, when she suddenly stops and pulls a long, blonde hair from my crotch (she has short, dark hair). I only say "Where the hell did that come from?" and don't waste a second thought about it. Action continues.

After leaving that Sunday, she begins to behave distantly, doesn't answer messages for hours and says she has a lot of work, so she can't join me next (that is, last) weekend on a little trip to visit some friends (first weekend we didn't spend together). I played along till Friday, when her answers began to get truly short. So I didn't message her until she wrote me on Sunday evening. 

Of course I noticed that something was odd, and when she wrote that she preferred to come here instead of me visiting her, I knew what would happen. So this afternoon she arrives in my town, we sit on a bench and she says that this isn't working, that we have differences, that we should split. She also brings up the hair in my crotch, suggesting that I was being unfaithful. I was baffled: That stupid hair hadn't been on my mind for two weeks and suddenly it is the main reason why we're splitting up. I tried explaining, but heck, *I'd* probably think the same were it the other way round.

Anyway, I told the girl that I was ok with splitting up, because it's true, we're very different on many levels; but that she please should not think it was because I slept with another girl. She only replied: "Well, either way it doesn't matter anymore."
<bot>: Used bedsheets I hadn't used since my last relationship, girlfriend finds a strange hair in my crotch and dumps me for thinking I cheated on her.