Struggling with care

I’m seriously starting to feel run down, exhausted with caring for a friend of almost 30 years who I am also next of kin to this person. He has terminal pancreatic cancer and since his first round of chemo, it went disastrously wrong for him and within 5 days turned him into an invalid where he is incapable now of even getting to the toilet, is wearing pads and can do very little for himself. I’m currently living with him and this is pretty much at the stage of needing constant high level care. He wants to remain at home rather than go into hospital. I finally got some care services in to help but they’re not the best and cut corners all the time. I had no idea this would be so difficult and draining as I’m the main carer for him. There seem to be no real support for people in my situation at all. Getting no break and every day, his condition seems to worsen that much more and he is adamant he won’t go into hospital. He’s not quite at death’s door yet so cannot be admitted to hospice care. I’m feeling seriously drained physically, emotionally and even financially as social care keep giving me a list of new things to buy for him. The person I’m caring for seems utterly oblivious to how much time, dedication is going into him. Can’t handle much more of this now as the cracks are really starting to show now.