How do I help my friend

I don't know how to help my friend. She's says I'm helping by just listening to her. She's severely depressed and she self harms. She promised me not to commit suicide because she couldn't do that to her mom. She doesn't have money to go to a therapist. She doesn't want to talk to anyone. She's so depressed and I don't know how to make her feel better or relize things will get better. What do I do!?