I guess the only thing that helps me sometimes is to realize that the only person you're going to have at the end of the day is yourself. What makes you happy? Just try to do that to distract yourself. Personally animals and books make me happy. But I know the feeling. Sometimes the darkness just has you for the night and it's hard to pull yourself out of it.

Do you have anyone that you can just spend time with without judgment? Mother, father, a sibling, etc.?

You don't have to be good enough for anyone except yourself. So work on that first, that's my advice.