[Those words do nothing but serve to make him angry, frustrated-- he focuses only on these emotions, too overwhelmed to even consider these words, that devotion in any other way.]
You're wasting your life! Some day, you'll die, and I... I won't. I'm not the same as you, anymore. With Himawari-chan, you could at least... live.
[You shouldn't waste all your life on someone who can't leave the shop, who can't be... anything to you. If you keep visiting him? Fine, he can't stop that. But he won't be so selfish as to take your love when he knows he can't ever match it, can't ever offer the same kind of devotion back. He's tied to the shop, to the spirit world, to his job-- to his promise. The prices have to match, and you're offering him far too much.]