I have been told that you have problems with other kids. That is totally not good! Anyways, I came up with some things to help you. Since you feel left out, I think that when you ask to join them, they might say yes. If they say no, I would say “Fine” and go ask somebody to play with you. If you are not in that situation but somebody else is, I would ask them to join you. If they say no, at least you did the right thing.