Well actually, she kinda developed a crush on the viscount and apparently, he felt the same way (but then she figured out he was engaged already and began feeling lost). However, during the part when she danced with the Earl, she was also gaining some feelings - ish. So currently, Jane is facing two problems which is trying to keep in mind that she shouldn't be swayed too much by the Earl's actions since its only an act, and trying to deviate her feelings away from the Viscount because he's basically already an 'impossible to get' guy now.