Don't be afraid to fall in love. Be afraid of not having the opportunity to explore your own heart during those moments when it is bursting with passion and joy, as well as the moments when it is breaking with loss and loneliness.
Online dating is okay if you're trying to maximize your potential reach. But don't spend Sunday afternoon browsing dating profiles hoping to find a partner who is likely to be at a yoga class on a Sunday morning. Go out there and live your life.