Here is a list of things no one should ever have to hear:

You aren't good enough
You are too ugly to sit/hangout with us
I am sorry (instert name) but your son/daughter didn't make it
You can't hangout with us because you're disabled
Being gay is a sin, you cannot marry who you love
I don't love you
You never meant anything to me
You're a waste of time
I never want to see you again
Kill yourself