One of the girls I met gives me compliments pretty often, maybe once every other conversation.

Things like "you seem like you could do anything you set your mind to" and "I knew [your interviewer] would like you!"

I've been assuming these as strong IOI, and I'm making moves. But I'm curious how often you guys get compliments.

It's possible she's just a nice and encouraging person, but I think it's more likely she's interested and I figure there's no harm done if I'm reading this wrong.