Does she like me

There's a girl at my school who I like and I think she might like me 2. She sometimes says stuff that makes me think she likes me but sometimes she says stuff that suggests that she doesn't

how do ik if she likes me or not (I'm 13)

Like what are the things she says to make you think she likes you?

She says stuff like can I pet your hair but some times she says I'm a retard it really throws me off