My Friend Keeps Leaving Me Out What Should I Do?

Hello , sorry if this is a little late people always say that you should move on or forget about her , but I know its really hard because you love them soo much and they just keep leaving you but they'll come back when the other friends gone they'll come running back thats what my friend does soo try and meet another friend get close and join more groups if your into swimming go for that.. Dancing well.. Me and you would get along hehe x

Well isn't this just the worst feeling it truly SUCkS. :( It doesnt sound like they are being a very good friend. You have a couple of options.
As hard as it seems maybe you could talk to your friend and tell them how you are feeling they might not even realize they are doing it, if you don't feel like you could talk to your friend by yourself it would show that this person is rude and feels like they have the upper hand (power) over you and that is the exact reason they are leaving you out and not someone else because they feel powerful when they do it and know that you wont do anything about it.
If this is the case talk to another friend in your group and tell them how you are feeling and ask them to come with you to talk to this person about the issues.
If you don't have another friend that you feel that you can trust maybe see your teacher or school councilor and they might get you to together to talk about it in a way that you both feel comfortable.
If this fails and only if none of the above works, invite your other friends over for a sleep over, to go shopping or hang out with and don't invite the person that is leaving you out and they will soon get the hint.
If none of this works it definately mean that person wasnt really your friend in the first place.
Just remember that you really deserve friends that are going to treat you well and that you can have fun with not feel sad and excluded around. Good luck let me know how you go.

The same thing is happening to me but the thing is it's one of my other closest friend, she's just not as close, they keep picking on me and laughing about it, it makes you wonder whether you are just being stupid but you know your not, it's really hard 'cause you want to talk to them about it but you don't, this happened to me many times (by the same person) with different people but she comes back to me then leaves me again, I have talked to her about it and she just says I am being stupid, it's so hard, just leave it and hopefully it will get better, if it doesn't, if there are more people in your group of friends, try getting closer to one of them, just hang in there, they could come back to you, it's hard I no :/