GIRLS HELP!!! i like this girl, but i dont know if she likes me back?

i met this girl in my world history cl and im pretty confused about how she feels about me. i gave her roses on valentines day as a friend. we talk and txt each other but when i see her sometimes i get really nervous and completely ignore her. 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. 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 tell her staright up "i like you"