['My friends from high school decided to gather and have dinner together. I was the only one left out. So disappointed in them', "That's kind of rude for them not to invite you. You should tell them you were hurt.", 'I think i will just let it go and not to talk to them ever again. Such times provide good lesson to learn who is true friend and who is not']
You are right. Now you know who your real friends are.
My high school friends decided to gather and have dinner together. They did not even bother to invite me