I Just Dont Understand

I don't understand why I start out good friend with people but then within a few months or less then don't want anything to do with my. my roommate and I got along well- I took her to France with me- but now she keeps all of her stuff separate and says I use her stuff (only useD her hair dryer and straightner that she said I could use and I stopped when she randomly decided it wasn't ok any more) i finally called her out on it and she said that I used her stuff and that I broke two pairs of her shoes- only one of which I ever wore (and I even said I would pay for both to try to smooth things over) and that we had such different personalityies- which Im not so sure about. We were fine when I took her to France with me. And this just isnt the first time something like this has happened- in fact it happens all the time- people get along with me really really well for a month and then just break all contact. I dont get it and it is really wearing on me. So now I don't know how I am going to get a new roommate come march... everyone else already has their situation sorted and no one wants to live with me and I dont knwo what I am going to