Am I depressed if I feel like crying almost every single day?

Quite possibly. You certainly sound like something is overwhelming you. If you've suffered a recent major loss, it could be part of the grieving process. Whatever the cause, it sounds like you would benefit from reaching out for help. Talk with your physician about options. Antidepressants may be needed, but perhaps you need to work with a professional about what in your life makes you so miserable.