How do tell if she likes me

I’m in 8th grade and I am short (4’9 to be exact), a bit chubby (you can’t tell that I’m cubby If I have a shirt on), and a chubby face....

I’m in 8th grade and I am short (4’9 to be exact), a bit chubby (you can’t tell that I’m cubby If I have a shirt on), and a chubby face. So I can’t see why a girl would like me but yet I think a girl is flirting with me. she came to my lunch table and a talk just to me, the push me in the hall and said boo ( the push wasn’t hard at all), and after school wall waiting for the bus she was talking to me and my friend and I think I saw her taking pictures of me. Is she flirting?