He in fact was completely oblivious to the invitation; if it had been a little more blatant, he may or may not have accepted, but he continues on as though he has no clue what she was offering.

He waits for her to take a sip of her hot cocoa and propose saying everything, which is admittedly daunting. He swallows. "Everything is a lot... are you quite sure? I admit that I feel somewhat responsible for making you cry, and that bothers me. I'm a very detailed person and I don't... really want to make you experience that again, intentionally or not."