I'm 11 and I have no friends, just 1 girl at school and she doesn't play with me outside of school. I need some advise

Well, since I don't know you, it is hard to say what you are doing wrong if anything. Sometimes peoples interest are just different. You can try finding out what some of the other kids are interested in and try join in on those things, like sports, crafts, games, etc. Don't try to change who you are just let them see who you really are. If they don't want to except you for who you are then they aren't worth it. You are in the hardest years of your life (I think middle school was the worse). One thing I learned when I got older, is that age group really respects people who stand up for themselves. Never change to impress others. Some may tease you for that but they really are jealous of your confidence. Be kind to everyone, even those that are mean to you. If someone is being picked on, stand up for them. Even if you don't become super popular, those few really close friends are so much better than a lot a friends that only like you because you are cool. You will keep the close ones longer. There will be better advise coming. Be PROUD of who you are and love yourself!!

Dear Sammynewmom,
I grew up in this same situation. I had no friends for a very long time, until my late teens. I was 26 when for the first time I met real true friends.
My heart goes out to you because I remember being your age and going through the same thing. As you continue to grow wise you will find so many real friends yet real friends, new friends take time to know. You are the best that life has to offer to a friend, God Bless