Ahhhhhhh! GIRLS!!!?

i met this girl in my world history cl and im pretty confused about how she feels about me. we talk and txt each other but when i see her sometimes i get really nervous and completely ignore her. i even gave her roses on valentines day as a friend. during cl i see her look at me and now that we sit together AGAIN she randomly yells out my name when im not looking. she also told me friday the dude she asked for the sadies hawkin dance she isnt going with him anymore and letting another girl go with him. i thought maybe she might have told me that for a reason. should i walk her to swim practice because the pool is next to the gym and i have volleyball practice afterwards anyways? what should i do? i dont wanna straight up tell her "i like you" i dont want a gf yet and im pretty sure she doesnt want one either, but i wanna be really tight with her. so maybe if were like ready we can take it a step further...