Should I Ask Out Or Not

So there is this girl i like at school. She gives me that warm fuzzy feeling, and she is around me every now and then. I have liked her for about a year now, and i came out to tell her at the end of the school year last year, but she never told me how she felt. I have been too nervous to confront her, but almost everyday, me or her wind up talking a little or having an indirect conversation. And very often, i see her looking at me, but im not sure if she really is. She smiles at me every once in a while, and if im lucky, we talk to eachother for a minute or two. I’ve been thinking of asking if she likes me or not, but im too nervous, and afriad i would embarass her or wind up embarassing myself from rejection. Btw: Ive never had a girlfriend before, so I dont exactly know how to ask her out.