It's this girl starting to get into me? or is it just me imagining?!!?

I started my volunteer work at Kaiser Hosp and I met this girl, well first of all we didn't know each other so we didn't talk for a while, it' was our first day and we were sent to get our badges at some office together, And like I said we didn't speak on the way there, But then all of the sudden I asked her "what school do you go to? and she goes at the same school as me but we're both in vacation, and then we started a conversation and at the end of the day, I saw her again an we went home talking to each other, for the next 5 days or so I didn't speak with her because she was busy, But I did saw her p by and she smiles with me everytime, and so do I, But I tought it was just because of friendship, But today I was ready to go home and I didn't see her, but she screamed at me Hey your leaving and I was like yeah, and we started a conversation, But she was at work moving some kart to a closet, but it looked like she didn't care, she kept talking to me, and most of all smiling at m