Does this girl like me? She goes in my university and we have class together and we sit next to each other?

Well, At first I sparked a question telling her that if she has done her written homework for College Algebra and yes College Algebra is the class we have together and then we went together to two expos at the university and we sit together outside in the university twice and she covered me with her umbrella and offered me money and she was concerned about me. She stayed speechless when I told her that I wanted to be friends with a girl I have in my other class. ummm I helped her with her homework and visa-versa and she is kind of touchy with me. She put her hand in my shoulder she was using it to stretch herself and two weeks ago I was walking to the class I have her and when she was talking to her friends and saw me immediately she quitted the conversation and rushed to talk to me and also she left-semi hugged me as she was laughing at something her mom told her and she playful hit me. She always smiles at me when I'm around and always talks to me whenever she sees me and doesn't get embarrassed when she talks to me with people or her friends and she is always friendly and nice to me. What do you think?