It's not that I feel it's an obligation, it's...

[His words are lost to a bitter sigh. He's not so oblivious he can't tell she'd really rather he left her well enough alone, and he's not going to push her to let him help if it clearly makes her uncomfortable. He'll just have to live with his guilt.]

...all right, if you're sure. I hardly think I deserve the thanks, but... you're welcome, I guess.

I wish you the best of luck.