I quit nearly four months ago. In the early days, I felt that flatness and struggled to imagine life without alcohol. That faded with time. Now, I can't imagine a life with it.
It would derail the feelings of peace, focus, contentment, productivity, and growth I've already been able to experience. You've made the right choice. Continue down the path of sobriety and the flatness will give way to a better life. Life as it's meant to be experienced.