No bullying your tsun!!
Tbh, what he did is kinda manipulative. In this case it might be cute but that kinda behaviour can lead to some nasty manipulative stuff if left unchecked.
@ChickenSoup Yea, it does leave off a bad taste in your mouth...but its still ok to do it once since being publicly told by someone that they hate you kinda hurts your pride a little bit even if you know they don't mean it.
She kinda deserves it when she says she hates you in public. No matter how well-meaning or good she is at heart, publicly shaming your boyfriend is a no-no.