I don't want to get into too much detail, because it will be long.

But a family member has PTSD and depression, it's pretty bad. They're stuck in a rut and are thinking so negatively. Everything I say they shoot it down and have something negative to say. They are getting professional help but they just started so i dont expect to see drastic results right away. I invite them out and they usually turn me down. They say they feel alone, have no friends, and are scared to go out. But yet when a friend invites them out or tries to talk to them they shut out or are short. It's like they want me to help them and fix them but i have no idea how, I'm running out of ideas, idk if im making it better or worse, and I feel like its taking a toll on my own life.

Is there anything I can do to help? Is just being there hearing out their cries enough? At what point do I start focusing on my own mental health? I feel like their constant negative energy is not good for me but i dont want to abandon them.