brother has bowel cancer which has spread to liver , had chemo and 3 surgeries to prolong life , cancer progressing shown in bloods but not shown itself in further tumour growth, mentally he is overwhelmed, doesn't want to talk and I feel useless in that area of support , does wish to die at home but scared will end up back in hospital and not get home again , will support in every way I can but I'm close to breaking, any advice ?