Well... I think Lizzy just means his general character.
Written by Helen Halstead
(5/7/2007 12:37 a.m.)
in consequence of the missive, Quote Chapter 9, penned by Carolyn
She understands Bingley to be impulsive, and easily influenced to go here or there. (Although she rather expects hm to be influenced to stay near Jane in this case.)
IMO Bingley wouldn't hint of an attachment to Jane, especially in front of her mother. There would be implication of a proposal to follow shortly. And Elizabeth would not carry on such a conversation - hinting at love matters over her mother's head. It was all so dreadfully serious, and young men did have to be very careful about arousing expectations when they have not made up their minds.