So since she said he allowed her to call him by name a couple of months before her death I think he might have fallen in love with her at some point before her death, but she was still afraid of him so she thought he didn't care.
Pro tip to anyone discovering this manga just now: Just skim through the bad parts. It's a really good series, but it has so many dumb parts that are stretched out for way too long, which causes a lot of people to drop it. It's pretty good if you ignore that.