[He's going to get a minirant here. It's an over-reaction, but she's in a bad place and he hit her biggest trigger. Sorry, kiddo.]

You didn't offer, you just told! Nobody orders me around! Nobody! Even if you were the only person to talk to me, I'm not going to do anything somebody orders me to do! I don't want anything to do with you! So just shut up! Shut up and leave me alone!

[And she may actually be crying a little at the end of that, and hopes to hell he can't tell.]