You know what hurts? When your friends are always planning things without you, and talking about it on front of you, and when you don't like something they do and tell them nicely...they say, if you don't like it, then leave.

In scenarios like this you have just got to do what you want. If they are doing something you don't want to do then say you are busy. If they say they are doing something and you want to join in then speak up. People tend to prefer an assertive attitude because it doesn't leave them thinking that you are wishy washy or someone to disrespect. Life doesn't wait around for people you have to jump in. But if it turns out that they are deliberately leaving you out, or doing things that will get them in trouble, then enjoy your own company until you find a better group of friends, and you will.

Yup.  Been there, felt that.  If they tell you that, do exactly what they say and walk away.  They aren't your friends.  Chances are, they really don't care. (Sorry about the bluntness) With me, when something like that happened, it was because I was lonely so I would follow them around like a little puppy.  But they found it a bit annoying and even sometimes amusing.  They'd tolerate me for a while but then randomly say or do things that they knew would hurt me.  They often got kicks out of it.  Sometimes they'll tell you things like, "no no, your our friend, we like you."  But actions speak louder than words.  I don't mean to just bash them, I don't know the whole story so I'm just assuming here what the situation might be.  But if the puppy sticks around people who are like that, itll just get kicked and laughed at it.