Fake friends?

I have two friend they are always together whitout me. And IT really hurts. Yesterday i Asker them if WE could meet to hang. They said they werent allowed. Later that day one of them posted meeting sara ( illl just USE that name) the other friend ( i will call her Emma ) Emma said IT was funnyer to be whit( and they she said the name of two girls im kinda jealys and angry at, becuse i used to be friend whit her but they she just left me for a older better girl. I feel like im not good enough for anyone to want to be my friend. I also feel like im really judgy of people are they worth keeping. Help