British Shorthair kittens & cats in Santa Rosa, California

Buster is a middle-aged kitty who showed up in my yard about a year ago. Surprisingly, for a cat who's been on his own, he's very loving, trusting and affectionate. He's also very talkative. He looks right at me and tells me all kinds of things in cat, which of course I don't understand, but I play along by talking back to him and he loves it. I think he believes he's human--he tries to help with things like opening doorknobs--he reaches up and tries to grab the knob while I'm turning it. He also tries to grab my ankles (with claws retracted) when I walk past him. He's friendly with everyone--except other cats, that is. He's big, around 14 or 15 pounds, and can easily dominate. I love this kitty, but unfortunately I'm allergic to him. He's an indoor/outdoor cat but I'm having to keep him mostly outdoors because of my allergy. I'm hoping he finds a home where he can spend as much time indoors as he wants and with someone who will love him as much as I do.