My hedgehog is dying-just need words of comfort?

willie,my hedgehog,is elderly.he has had a good life in a big enclosure we built for him.but he has "wobbly hedgehog syndrome."the vet said,just make him comfortable.he is alive,but has been sleeping in one position all day.not suffering.vet said i could put him down in the morning,but that he may just p tonight.why do ifeel so guilty?i feel i should do something,anything,or like its somehow my fault?i feel so helpless!should i try to give food or water?he walked/ate yesterday,but suddenly tonite,he seems to weak.i just feel so bad.should i hold him or try to give pedialite or something,or just let him rest?thanx for ur answers.i hurt so bad....