Cut off?

I'm in bir of a situation right now. so I met this girl through one of my friends in a group chat and she messaged me privately, because she has stuff going on and she needs do talk about it (I met her around 3 days ago) and I of course said yes, because I love helping people and making them feel safe. So at first it was fine, just her casually talking about her stress. but it started to become a everyday thing. Her constantly talking about her problems, making me feel bad if I had to go to sleep or do school or couldn't FaceTime. And I'm trying to be supportive and see it from her pov. But I started to get mentally tired, because I was putting all of my focus onto her and ignoring my mental health and the signs of my mental health getting very bad. I thought I was being insensitive if I focused on my mental health for a second instead of helping her. I now feel like a therapist to her and I've tried to give her places she can go to so she doesn't feel alone and I understand being scared to reach out. I don't know if I should slowly stop talking to her, since it's emotionally draining me, because she never really asks me how I am and it's just the same thing over and over again and making me feel guilty if I have to do something instead of listening. do I slowly get her out of my life or continue listening to her. I don't want to be a bad person