Fantasy vs. Reality

Does anyone daydream or fantasize a lot during the day? Granted, I think it's somewhat normal, but some days I zone out and become so lost in my fantasies that when I bring myself back to reality, my world feels crushed. Hell, I don't even know what I am doing anymore. I could be at a fun event, yet my mind is still lost in my fantasies of a different life, a different me. I know that life is what you make it, but I sometimes think that my fantasies are the only things that keep me going throughout the day; they also give me a sense of peace. I'm 43, and at times I think that I'm too old to be thinking like this.