She's happy for you... if she's happy first.
aka Blair Waldorf from Gossip Girl
Only recently did Gossip Girl blond bombshell Serena stand up for herself to bestie and b*tch-in-resident Blair, who constantly undermined the bond Serena had with ex-boyf Dan. Plus, Blair always made sure Serena never shone brighter than she did. Try pulling the plug on this energy suck of a friend.