The other day I was having a conversation with my sister, when she interrupted me. I flipped out, told her she clearly doesn't love me, doesn't want to include me, and that I'm going to skip her birthday party because obviously I would ruin it for her. Among some other shit.

I knew I should slow down and I knew it was probably an accident. But I was fired up and kept going, and only left because I had work. I sent her a nasty text later as well, and spent my whole day anxious and angry.

I did end up apologizing to her, and I feel bad. But a part of me kind of doesn't. I know she didn't deserve it, but goddamn I hate being interrupted and I took it very personally. I'm still upset about it, multiple days later. 

This isn't the first time I've flipped on her. She's usually one of my best friends, but I can't imagine she really loves me very much when I've been such a huge fucking bitch all her life.