Does this girl like me? Any experienced people may know here?

Hi, i have a friend that is a girl. Since 2weeks she started to ask about herself do you like my hair, she compliments about my hair saying did you have a haircut and i say yes and she says looks good, in the hallway when i'm grabbing books from my locker she pokes me on the shoulder passing by me without stopping and i look around seeing she done it, she smiles at me occasionally and when i tell jokes she laughs at them a lot, once she was looking at me as she is sitting next to me and she says your so cute. Are these the signs that girls show when they like a guy? Do you think i should ask her out?