system
A chat on subreddit /r/NoStupidQuestions
human
I dont know your situation so this may not fit, but most often people get dumped not for the depression itself, but for their failure to manage it.   
I would go to therapy, maybe find a new therapist if the one you have isn’t working, and work on getting yourself better.  Then you can go out and find a new partner who will appreciate you for who you are.  Hope things get better!
gpt
This works two ways, partner couldn't manage OP's situation either. I would argue that a strong and healthy relationship the partner is supportive in helping someone through depression. But they cannot do that alone, so I totally agree about finding therapy/therapist to help with the situation.