How should i tell if this very hot shy girl is interested in more?

basically this really hot girl that is extremely shy girl i am extremely attracted too wants me to talk to her ever day after cl or she is visually sad and disturbed i for a period of time stopped talking to her because we didnt have a cl together and she would like dangle around me until i said something too her or walk past me angry at the time we had cl she had a boy friend but now im not sure anymore if i was to do something out right like ask her out it would be very bad because we would see each other everyday whats a good way to see if she is interested in more than just talkin but not being straightforward