"I hate you"

So logging on to facebook this afternoon, the first thing I notice is a chat up with a girl saying "I hate you." Now normal people would find this offensive, fight back maybe and would totally hate them back. But I dont know if it's just me right now or what, but I totally don't care. I'm not going to fight back because that's just so not me. I always give up on stuff super easily and I'm extremely uncompetitive. I would mostly care and think it as offensive but I've known for a few weeks now, so it's really no big shocker. I'm very certain, no, in fact, I know the reason she hates me. And when my caring is a 0 on a scale of 1-10, how can anyone expect me to hate her back?
Everyone says they hate drama, and I think I do too. But when I'm never caught up in it, it's interesting to have some fun once in a while.