Is she interested in me?

I'm not really sure if i like this girl. i just started high school last week and i didnt know her before then. we have lit and health together. we had a sub in lit on thursday and she let us just hang out while doin an ignment and she also said we could have our ipods and cell phones out. the girl was listening to another guy's ipod but she said he didnt have enough music. so she saw i had mine and we started listenin to it. she liked my taste in music and she joked around and said she would name her kid after me cus she loves my name. that day after school i had marching band and she had volleyball and she yelled from 50 ft away is that so and so, and said yea its me, and her friend she was with said who is that, and she said my best friend. i have only known her for a week. i think this girl is out of my league but a lot of people think i dont give myself enough credit. any advise for me about wat i should do like talk to her or think more of myself. wat signs would she give?