I feel for you Erika. I deal with depressing moment daily. I literately talk my self into being happier. Just know that it passes and you will at least get to a state that is more stable.

Use the positive energy that your cats or dogs have to make you feel better. Just smile and try it on for a minute. Sometimes just smiling makes me feel better. Try it when you would envy their joy and happiness. Yes, you will feel silly for a bit, but give it a chance to make you feel better.