I have always cuddled my babies to sleep

DS is now 3y8m and I still lie in his bed with him as he falls asleep, I have suggested a few times he put himself to sleep with a book or teddy while I sit on the couch where he can see me, he gets upset at this suggestion so I am happy to lay and cuddle. Soon enough he won't need me so will continue until he wants me to stop, whenever that nay be, school age or not