No a true friend wouldn't talk about you behind your back or try to doge hanging out with you. They would address any issues they have with you whether if you want to listen.
I know you might be feeling down and out right now but maybe you need to break loose from your pack of friends and meet news one because it seems like their slowly are distancing themselves from you.
I don't know what kind of mood swings your haven't around them but I can understand if it is relating to them not including you in their activties.
Also, I read your other thread,
https://www.askmehelpdesk.com/other-...ds-336764.html, it is very important for you not to start new threads regarding the same issues and your other threads have a little more information and you receive some good advice. When you do this you put your threads at risk for being deleted or the mods might just merge the threads.
Now I know you feel betray, hurt, anger, sad, and all other emotional in one. And you can always come on here to vent/talk, it okay. But I really think you need a new cicle of friends or a friend.