Just do whatever feels right. I learned that in a relationship you just need to follow your heart. Me and my g/f were at he new Harry Potter a week ago. I was there beside her thinking 'Will i grab her hand, or put my arm around her or what....'
At one point she sat foward to fix her hair, and my arm automatically went around her. And for the first time face to face, i told her i loved her and i kissed her. I didnt do it, my heart did.
It is best to ask someone ASAP, as you will only end up getting urself wound up otherwise, and getting ideas. Its much better to leave your feelings out. I always say it to myself.