Do you think she just extra friendly or she likes me?

Most of the time I see her, she always seem to happy to see me. She smile and say hi to me, but I thought she was being nice. Also, I think she tend to be little more flirty as she make jokes to me and when I was sit by myself on the floor, she lean on my back without notice. Recently, she approach to me with a cookbook and ask me for my advice on what cake should she baked. Acting nervous, I did something stupid which may seems so awkward but she cool with it. We talk for a while and we were just smiling and looking each other a lot, but it's probably that I couldn't get a word out of my mouth. Just wondering, is it just friendship thing or does she likes me? Would it be weird to ask her to hang out with me alone?