Yeah, it may be a YMMV thing, but I found it a very hurtful thing to say to someone. Not saying that she's a horrible person for saying it, but still - hurtful. I'm not a big fan of people saying hurtful things to each other.

Now, I can make excuses for her, she's under stress, House has been niggling at her about Lucas all day, she is defensive because she's not sure herself that she's doing the right thing with Lucas, she's worried about Hanna, House is a pain in the arse to deal with etc but I don't think the excuses change the fact that it's hurtful.

I wish House had told her to go to hell when she came to him a few hours later with this 'I love you but I wish I didn't' stuff.