This is awesome. I have a feral for almost two years that I feed too, and I can tell you, it takes some time before they really trust you. But when they do, what a feeling that is. I can't let my feral girl inside, because I have three indoor cats, and a dog, and my feral, Arwen, won't come inside anyway. But I live in FL, so it's Ok. But I agree, if you just let the kitty inside and let him out as soon as he wants, and just let him come to you when you are inside, don't put too much pressure to get him to be near you inside. I think if you are chill, and just relax, he will soon relax too want to get comfy next to you. I'm sure on a really cold day, he is going to become so grateful to have a warm place to lay his head, it will not take too long before he is sticking around longer and longer.
You are AMAZING that you can give this to this cat!!!!! I am so heartsick at times, that my Arwen is not inside my house. But she has lived outside in my neighborhood for 5 or more years, she is already fixed and ear tipped, and has a good thing living on my quiet street, everyone knows who she is and she is quite content. But I get so sad that I can't bring her inside, but I feel like it wouldn't be fair to me 3 inside cats and my dog...who Arwen does NOT like....which is why she does not go in my yard at all. I have much guilt over this, but I do the best I can for Arwen outside, and she is welcome to go in my garage, although she never does, but I'm hoping on the really cold nights this winter that she might, I'm prepared to try to encourage her to anyway.
Thanks for caring so much for this kitty