When Work Clouds The Life

I work at a small business which I love, but it's very demanding. If I were at a big company there would be at least 3-5 people doing my job. Even in my company there used to be 3 people doing my job. I barely have time to finish all my tasks even when I give it 100% and buzz through the work at breakneck speeds. It leaves me pretty exhausted. And when I get home, I find myself watching training videos to make me more valuable at work. It's so hard to balance life and work sometimes.