incredibly smart cat

My cat is a tuxedo cat, his name is shadow.
he must be the most affectionate cat iv heard of, he follows me around when i go out, he climbs to the roof to my bedroom window to get let in and sleeps in my bed, knowing i move in my sleep he sleeps on my pillow next to me.

Only thing is he has never been able to meow, well he can but you can only hear him if hes right next to you and it sounds like a kittens meow. Even though hes about 8 years old, that doesnt stop him though, he will just knock on the window or the door with his paws .