What shuld i do?

i am a sophmore and i like this junior. we are friends and i have her fone #. we used to tex a lot and lately she hasnt been getting my messages..im thinking that it has smethin 2 do with my fone. i rarely c her @ skool. wat is the right way to ask her out? where should i take her? (she is extremely hot so i bet she gets asked out a lot)