Guess what? No more. No more refering to her as 'tall Emma' (as our friend in common is also called Emma) - she's fat Emma now. No humouring her faux Goth imagery, it's pathetic scene cries for attention. No pretending that her musicial tastes are anything less then alternative pop. And no more words, from now on she's just going to get grunts and dismissive hand gestures.
She's going to ask why you're being so mean to her. I guarantee it.