Ok this is a rather stupid question since I still kind of suck with people, but if a girl is warm and friendly towards you every time she sees you, does that mean that she likes you?

Let me explain why I'm asking such an off the wall question: there is this girl that was in my English class this summer. I was quiet and rather awkward for the first 4 weeks or so but started warming up to the class just a bit towards the end of it. Towards the last couple of weeks of class or so, this girl was nice to me every time she saw me. We haven't talked a whole lot but she seems like a genuinely nice person and always waves at me and approaches me when she sees me outside of class. Anyways, I was at my student job today and I found her and she approached me and started inquiring about my job and started showing me her class schedule. She started asking me what classes I'm in for the Fall. When I said that I'm not in any of her classes, she seemed like she wanted to be in a class with me. I haven't seen her quite like this with any other male in the class. She mostly hangs out with females and I've only seen her with one other guy in a group of 4 or 5 people once.

Do you think that she might have a thing for me or is she just one of those types of people that likes to talk and be friendly with people?