Every time the clock strikes 11:11, I wish that you'll ask me to be with you forever.
I know it will never happen. I'll keep on wishing, though.
To cross one's fingers is a hand gesture used to superstitiously wish for good luck or to nullify a promise.
Some believe that the gesture originates from pre-Christian times and, in many early European cultures, two people were required to use their index fingers to form the sign, one to make a wish and the other to support it. It was believed that the cross was a symbol of unity and that benign spirits dwelt at its intersecting point—to wish on a cross was a figurative way of securing the wish at the intersection until it came true. Over the years, the custom was modified so one person could make a wish on his/her own. (Wikipedia)