When has it even been justified to send someone a message over Facebook because they didn't invite you to their B'nai Mitsvah? Oh thats right, its never been. Someone I know messaged me on Facebook because I didn't invite her. It wasn't because I don't like her, its because I don't know her that well. Yes, we did have two classes together but we barely ever talked. And I'm sure it was my other friend who I invited that told it or mentioned it to her. Not only does it make me feel guilty, it also assures me that I did the right decision by not inviting her.
She's never invited me to any of her parties, so why invite her to mine?