Not sure if this is similar to your situation or not, but I've had friendships that were pretty normal at the beginning, but which slowly degenerated to the point where the other person just sort of expected me to be at their beck and call. I also sit there trying to figure out if it was always that way or if it really did get worse over time.

It sounds like you have a pretty good idea of where you want your boundaries to be but had trouble when this person pushed. Her thing about the blind date just sounds insane -- has she never started a new job before??