[She barely even realizes that was a date, and sadly doesn't know Grimm's involvement.]

I'm not sure but Hollow Knight is still figuring out a lot of very important things about themselves. I feel like dumping such serious feelings on them right now wouldn't be very considerate and might even make them feel pressured?

[Even more than rejection Lobco fears Hollow Knight deciding to be in a relationship with her purely to spare her feelings or out of a sense of obligation.]

Perhaps I'm not giving them enough credit but...I just really, really want to avoid that scenario.