Hi. I think this chapter is just fine as it is. The only comment I would make regarding a possible change is related to this part :
"Holly, last night he told me he desired nothing more than genuine friendship with me." He didn't say that he "desired nothing more than" Though of course, the whole point is that she thought that was his meaning, perhaps it could be a little more ambiguous (that way Holly could at some later point mention it).
"It was not until then that I realised I must have been subconsciously holding out ... " Isn't the notion of the "subconscious" terribly anachronistic. It is Freud who developed the term, if I am not mistaken. Perhaps, she could say "somewhere in the back of my mind" or somesuch.
Other than these VERY minor remarks, I do think it is very good.
Good luck with the rest. I imagine that this is getting more and more difficult. I do have a more general suggestion, that might help with the rest, easing up a little of the pressure on the developments between D and L : Perhaps you could introduce some developments through correspondance with Georgiana. She is all alone after all, and her devoted, thoughtful brother doesn't seem to be thinking of her at all. And he used to be such a good letter writer!
Thanks for everything!