I have known this girl for four months. We were in the same lesson in university. She showed signs of liking me (or at least I thought she did), asking me personal questions, tapping me on the elbow to get my attention and suggesting a couple of times that we go out for dinner together. Acting on the assumption that she likes me, I took some action, asking her to movie once (which she gladly accepted) and chatting with her on very personal issues (which she seemed to have enjoyed). So she definitely knows that I like her.
But since then, she has cooled down a lot, rejecting all my suggestions of hanging out. At first I thought she is just no longer interested, but her actions seem to suggest otherwise. We ran into each other in the student lounge a lot and I sometimes "accidentally" brush against her arms. She doesn't flinch an inch. She even initiated heavy contact a couple of time. Using the excuse of borrowing my computer, she leaned right into my personal space, pressing the side of her arm against my chest. And she did so while joking that my computer is crappy...
So my question is: is it normal for girls to initiate a lot of physical contact with a guy who she knows likes her, but whom she doesn't like back? Or does it mean that she is still interested, but I'm just pushing too hard?