["My 'friends' left me out of their social plans yesterday which wasn't very fun for me", 'Did you ask them why?', "No, but I think it's because we had a major argument and they all took the other person's side"]
I would let things cool down for awhile and maybe they will have a change of heart. If not , apologize and see if that helps.
My friends left me out of their plans. I'm a pretty social person so it's not very fun for me