Erica: I don't... make friends easily. I'm awkward and am bad at small talk and generally don't like people I don't know... but I made friends with you and now you have this thing and that thing is Sloan.
Callie: Are you mad that I'm sleeping with Mark Sloan?
Erica: I'm not mad you're sleeping with Sloan. I'm mad that you didn't tell me that you're sleeping with Sloan. I'm mad at you. Because instead of telling me and admitting that you're one of those girls who goes all pouffy when she gets a boyfriend, you disappear with your thing ... I don't make friends easily.