That means BACK OFF, and let her initiate conversation, etc. etc.... don't play the creep stalker character, chicks don't like that.... Oh, and if I were in your shoes, I would stop buying her stuff, she might take that as you trying to BUY your way into a relationship, or you will spoil her, and shoot yourself in the foot in the future... Anyways.... thing to do is back off. If she doesn't want a relationship with you, then it won't work. You can't have a working relationship where 1 person is all in, and the other has one foot out the door...
You have MUCH to learn grasshopper.
As bobojuice said, ALL women are insane.... so keep that in mind.