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My 2 best friends live a block away from eachother and they go to movies, go shopping, and have sleepovers-usually without me! They include me a lot but most of the time they don't even think to ask me! Last week I asked them if they wanted to sleepover at my house and their parents said they couldn't but I found out later that they had a sleepover without me that night! During the summer they had sleepovers every single night and didn't invite me! I always have to be the one who brings up sleepovers or hanging out. In school they have lots of classes together and I only see them at lunch. They think that I don't know that they exclude me. What should I do?
Thanks! Sorry this is so long!

No problem! That's hard when it's 3 friends together. Usually one person gets left out, it's normal. If they aren't making an effort then you shouldn't have to either. I think it's great if you still want to be friends, but try making plans with different friends who have time to hang out! You deserve friends who will make time for you!