Oh, I get it. Your two favorite pastimes, drawing and keeping track of everybody I ever talk to.

[It's funny because she's being ironic and he's absolutely not kidding.]

...Do you want me to stay here tonight? I can. If you want, I mean.

[What she means is, if it would make you feel better. It's not often that Rohan admits to being scared of anything, much less something having to do with someone else and not himself. He's perking up now, and some of the anxious panic seems to be subsiding; she doesn't want to do anything to jeopardize that, not now.]