When you are angry then you may want to post an angry Facebook status. Let the world know that you are ticked off and why. Just remember to keep it clear and clean, and always think twice before you post a status out of anger to make sure that your actions are appropriate.
Anger doesn't solve anything. It builds nothing, but it can destroy everything.
Learn to be ok with not being invited, included, or considered.
Sometimes It's easier to pretend that you don't care, than to admit it's killing you.