That is your key to conversation starters, approach her act casual you are there to know her and learn more about her. Use the interests you both have and keep talking to her about it. Yes, you are shy and might find it hard to talk to her face to face. I was there once, unable to do anything but admire someone I really liked. I broke out of that. I believe you have the will to break yourself out of that state and enjoy your own confidence. Even a small act of saying hello and how are you in the halls or even in class is progress. The more you build up the relationship between you two the better it is to speak more comfortably about more than how she was feeling today. It's all on you to do what is needed and none of us here can do it for you. Don't just text here from afar get closer.