I realized this today as I rode down a hill without holding the brakes, just feeling the cliche wind in my hair.
The most important part of both is trusting yourself. Once you learn to ride a bike, you never forget. You do, however, have to relearn how to trust yourself. See, ah, I don't really know how to describe it. It all made since while I was on the bike.
I guess what I'm trying to say is: first love is hard. It takes a while to find the balance and the brakes, and eventually you may fall face first and chip a tooth. From then, you have a choice to make. You can get back on the bike or not. If you chose to get back on the bike, you already know how to ride it now, you just have to learn to trust yourself. It's a leap of faith, but if you don't take it, you'll never feel the wind in your hair.