It makes me sad that you're having such a hard time.
Keep up with positive affirmations. I'm a firm believer in positive affirmations. Write them over and over again in a notebook. Write down I am happy over and over again! Write down I am motivated over and over again! It's worth a try anyway.
Life IS worth living. Think about your kids. They love you and need you.
Try to do something that makes you happy every day.
Roll yourself out of bed and take a shower. That will make you feel better.
Things will look up for you.