When you are really upset, do ISTps do anything to help? Or do they just sit there blankly?

Are they sympathetic/empathetic to others being sad, upset, etc? Or do they just ignore that of feel annoyed by it?

I've noticed w/ my bf on the phone I can't tell from his tone/words at all if he cares if I'm upset (like if I'm crying), so I will have to ask if he cares and he'll only say something like "yup." (which doesn't really tell me very much). Or something like "Well, I didn't hang up (so must care)." (which isn't exactly reassuring).