[He follows her lead, leaning back into the sofa. He sips his tea to hide the way he's instantly smiling when she says that. It's incredibly nice to have someone need him.]
Then I hope you won't have to be. [He sounds much more confident than he is in his ability to really be there for someone. Emotional fortitude is not his strong suit... and so after a pause in which his smile vanishes, he admits it. Sort of.] I don't want to disappoint you.