The feelings lasted quite a while. I do t think they started to fade until well after she moved in.

How long is “quite a while,” though, months-wise?  I’m just trying to get an idea for the timeline of all of this. It sounds like your girlfriend was a classic rebound, which would explain why it felt right at the beginning but then started to feel wrong after a short while and why you feel the way you do now, which does not make you a prick. I do worry about your girlfriend thinking butterflies are going to develop. If anything, butterflies usually fade, and it might be good to start preparing her for a breakup so she isn’t just completely blindsided by it.

It’s a good thing that you want to make sure she can afford her bills, though. Hopefully she’ll be able to move back closer to family and find a roommate or something. Living on your own these days is hard when your income is low.