Ghost or dreaming

I woke early this morning before 6 am - spring must be on its way and my long winter hibernation is coming to an end. As I lay in that dreamlike, half sleepy state I felt my favourite cat on to the bed with me. I could feel the bed move slightly - he was lazily and cosily washing himself - with the ocassional chew at the pads of his feet. Such a comforting feeling. But it wasn't him. It couldn't be. He died 18 months ago. Even though as I lay there and knew there was no cat on the bed - he was there. I could still feel him washing. I felt great feeling of love, comfort and then grief again.