My name is Kitty!

Kitty came into our back yard. We have a large partially wooded property near a creek with many animals around. There are other cats around too. He let us pet him. The next time he came up, he followed me into the house. He seemed like he would be the perfect pet. He's very loving and cuddly. Then I found I was allergic. He's now spending the night in the garage and free to come and go as he pleases, which he does a lot. We feed him in the garage. He has never gone to the bathroom in the house or garage, always outside. But since I put a kitty litter in the garage, he uses it.
Since he could always come and go as he pleases, we thought he would return to his original home. We though perhaps we had found his original owner recently but it was not. He has been here for the summer up to now. We are getting ready to travel and cannot just leave him here.
He's a beautiful silver tabby. He 'talks' to me when he wants something or if he wants to show me something.