Question About the Girl I Like?

i'm a h.s. junior & i like a freshman. when i see her in the hallway i smile & say hi. i saw her in the caf 2day. she & her friend were looking @ me. after i finished lunch, i went 2 the school library. 5 mins. after i got there my crush & her friend came in. they sat at a table kind of far away from my friend & i. the kept looking at me periodically, especially my crush's friend. what does all this mean? does my crush notice me or like me back? is her friend looking @ me b/c my crush told her about me? do u think they went 2 the library just 2 look @ me?