I’m thinking in this case it’s either referring to the fact that the Duke was a ghost and so couldn’t be with Dolly, despite his feelings about her. Or it’s in reference to Dolly’s feelings about the Duke.
The ghost is in love with dolly but the actual duke(the owner of the body ) isn't in love with dolly. So one is attracted to her, whereas the other would never eccept this, if that makes sense.(I'm not good at explaining)
I think the duke does not think Dolly will like him back and thus is settling for fawning over her from up close despite making her uncomfortable. Though we all know she will develop feelings as well with time
Doesn't Lithromantic means being romantically attracted to someone without wanting to be with them at the same time?