Wouldn't advise giving away all his belongings mignonette although that is how you feel at the moment.
My previous 2 cats had to be pts, both very old, one was kidney failure about 3 yrs ago, the other same at the beginning of this year. The day after I bundled/bagged up all the blankets/beds & put them in the garage as I didn't feel I could look at them.
Both times, about a month later I took them out to wash them & it was comforting to still have them. My new cat happily sits on them/uses them.