You should try to communicate with her regarding this issue, you should try to make her understand the meaning of depression, show her the side effects of it and ask her to help you. Explain to her what you’re feeling and what you’re going through inside out. If this doesn’t work then you may go to your family or your closest friend, they might help you in this situation. If all this fails, then, you should see a psychiatrist and do as he/she directs you to do.