My closest person is on verge of death

My late grandpas sister who I was very close to had an open heart surgery and she doesnt feel well, she is in hospital right now, refuses to eat anything, vomits, cant walk and barely stands, I stayed often with her during my childhood, she almost raised me, loved me more than anything and I love her more than anything too. She was always there with me during my ups and downs, I videocalled her and shared about my day to her everyday and she was always there with me. She was my closest person ever. Im so scared to lose her. My cousin who betrayed me barely visited her, and my grandpas sister who is in hospital worries that my cousin may hurt me again and is anxious bc of that. While my cousin just seems careless abt it? And my aunt defends her and bullies me (well im used to that and idc what she does to me). Im just so worried I might lose the dearest person to me (grandpas sister who is in hospital), she is so kind, she gave me her everything, and ugh I dont want her to die. I cry everyday, I went to hospital today and could barely talk to her bc i wanted to cry. Its 3am now and I cant sleep. I dont think im capable of doing anything, im sobbing now thinking about her in that scary hospital. I just want her to feel better and heal. My vision have gotten worse over days bc of this, im scared for my vision too. Im so sad I wish i could do something about this, but I feel so powerless and just sob.