Does she care?

I feel like I’m always the one helping and listening and I feel like I’m just existing for her. She claims that she lives because of me, I’m the only one she trusts and not even her Therapist and that she doesn’t want to be alone and I just feel like Idk. I feel pressured. She has helped me I guess in the past but I don’t remember much. Idk. I’ve never been deep about my anxiety but she’s of course aware. We both have depression. I’m probably overthinking.