Like Wildflower said they do tend to want to be alone at the end. With my Noah he did lay in bed with me and while he didn't want petted much he would purr a bit if I touched him and he knew I was there and loved him. If he'll let you be beside him a bit it might help you feel a little more connected during this time. I also had a big talk with both of mine that I loved them so much and knew they loved me and thanked them for being part of my life for so long and told them to tell me when it was time to let go and if they needed me to make that final call I would. Both of them did and both times it was really clear that it was time. I hope you don't have to say good-bye that way but I do think they will let you know if the time comes.