Does she like me?

I like her but I don't know if she likes me back. But its not like shes completely oblivious to me. I am in her homeroom, english, and science. I also sat next to her in science she talked to me A LOT. She always talks to me a lot normally. She is always asking me for homework in homeroom. She likes to write "hi" on my arm a lot. And she lightly bumps into me on purpose in the hallway. She smiles at me too. I felt like she likes me but I am not sure.Can you tell me if you think she likes me or not. I don't want any answers with ask her either.