My reply: neither do most people who write. We work, go to school, have families and go to the gym. We do the million other things everyone else does, but we also write. The difference? We make the time.
We sacrifice the family meals, friend time, our evenings and weekends off to write. We record our favourite shows instead of watching them (I counted 5 episodes of True Blood, 6 Vampire Diaries, and 3 Glees episodes waiting for me to watch because I was writing/editing). We steal five or ten minutes in the day to get a few words down. We take notebooks everywhere just in case inspiration strikes.
We don't always have the time, but we make it.
So I say to anyone who tells me they want to write-- just do it. If you are waiting for the time to start, I promise, it won't come. Be bold. Be brave. Write now.