If she is shy by nature, the best thing you can do is to keep talking to her. Once she feels comfortable, she will open up to you more.
You may find benefit in speaking with him about your thoughts and feelings. Perhaps spend additional time with him in person. You may want to nourish this relationship by sharing in additional religious activities. Hookers Bungle Bungles
Well, I leave you to your thoughts.
You might even want to gently poke his shoulder during conversation to see how he reacts. If he laughs and teases you back, that is a good sign. Humor is a good way to open a heart that is leaning towards you because it shows you are interested which makes the guy more comfortable. When he tells a joke, make sure you laugh.