Why is she doing this to me?

I just got back my friends house.. I was staying at hers for 2 nights, as noone was here to take care of me and I couldnt ask anyone else because they were all away. On a social site, she had me on her box, saying that she loved me.. When I got back home, I went on a social site and noticed that she removed me from her box and her status was ‘Dont just talk to me because your friends are away . ‘ I have no idea what went wrong for her to hate me all of a sudden!? I mean, it was quite a boring sleepover, nothing to do.. but I was polite and nice. I have no idea?!?!?!?!? HELP, I dont want to have a fight with her over what I did or didnt do?! Im quite close to her, but I have no ideaaa!!! :(