I would say....A LOT
"Call me ugly, call my baby ugly, but we all know the one who is envious and it's you (Insert horrible ex roommates' gf's name here) and your douche of a boyfriend ( insert horrible roommates name here) is a douche. You'll never know how much you hurt me..."
Or
"You call yourself family? Then why don't you ever talk to your daughter/sister. I fought family was supposed to be there for you through thick and thin, then why am I always wondering why MY family won't talk to me. I'm seriously disappointed."