First, a warning: this is LONG, so get comfy!

I am near tears over this right now.... I've already cried about it twice.

For those who have not read my profile: Two weeks ago we found a male corgi wandering around our neighborhood in the country. He had no tags of any kind, and appeared to have been dumped, because we noticed him just wandering around aimlessly without any supervision. We had seen him a few times before, and this was the case every time (wandering without supervision).
So two weeks ago, I coaxed him over to me in my front yard and fed him, talked to him, and after awhile I even convinced him to get close enough to let me pet him. After about half an hour, I had to go back inside, but he stayed in the front yard, laid down under a tree and watched my front door. He never moved from that spot until I went back out to him, then he immediately jumped up and seemed so happy to see me again! It was SO sweet and I was amazed at this behavior..... he seemed to be completely devoted to me already, and we just met! This went on a few more times throughout the day..... I would go back inside for a couple of hours and he waited for me under the tree, then get so excited when I came back out!
Needless to say, I fell IN LOVE! But of course I wondered where he came from. Every time my husband or I went out to him, we looked all around at the neighboring houses to see if anyone seemed to be looking for him. They weren't. I had fed him that morning, and he stayed at our place all day. Very late that night, when we still had not seen anyone looking for him and no one calling him, we coaxed him into our fenced backyard to keep him safe from the cars we knew would be speeding down our road the next morning. He's been "ours" ever since. Four days after bringing him into our yard, I took him to a groomer to be dipped, bathed, etc., and also got his shots. I named him Doc (Doc Holliday).
He's been with us for two weeks now and no one has come to our door asking about him, we've not heard anything about anyone missing a dog, and there have been no signs posted anywhere. Every weekday morning I have taken him out in the front yard on a leash while we wait with my daughter (and all the other neighborhood kids) for the school bus. No one has said a word about him being "So-and-so's dog" or anything else indicating that they recognize him. We live in a small neighborhood; maybe 20 houses total, and they are all pretty close together. If I lost a dog, I could walk door-to-door here and hit EVERY house asking about it in less than one hour EASILY.
Today my little girl was at a friend's house, and a little boy who was also there was asking if anyone had seen "his" corgi, and he described Doc. Aislyn (my daughter) came home and told me and pointed to where this little boy lives. He lives right across the street, 2 doors down! When these people step outside their home, they have a full, unobstructed view of my entire front yard. But he was in our front yard from 10:00 AM until after midnight that night and they never even looked outside to check on him?????? Because if they had looked for him AT ALL that day, they would have seen or "found" him instantly.
What am I going to do??? I am SO attached to him now and the thought of giving him up hurts SO much! I'm sure you all can imagine how heartbroken you would be if faced with the possibility of losing your baby! I want to do the right thing here, but I honestly don't know what that is! This little boy cares enough to ask about Doc now, but what are his parents feeling? If they miss Doc, WHY haven't they looked for him? I would have gone door-to-door looking for him AND put up signs all over the neighborhood, and every place possible within a 5-mile radius! I wouldn't let him run around freely, especially without tags displaying my phone number or something. They have a very large, fenced yard.... when he needed to go out, that's where he should have been; not running the neighborhood right next to a road that cars go 60 MPH on! Their apparent lack of concern makes me think that he was neglected.... like they just didn't care. And if that's the case, I certainly don't want him going back to that kind of home! When he first came here, he was so timid and anxious..... he seemed to be afraid of everything. We thought then that he might have been abused, but who knows? I don't like to jump to conclusions, but I couldn't help but wonder. Now he's relaxed quite a bit with us so far and seems to be more so every day. He lays on his bed at my feet while I'm sitting here at my desk, and if I get up to go to the kitchen for a drink, he follows me. If I get up to go to the bathroom, he follows and waits for me right outside the door. If I go outside, he goes too. When I go to bed, he sleeps on the floor next to my bed (on his own bed, of course!) He and I are just SO attached to each other, I can't stand the thought of losing him! But now I'm afraid to even take him out on the leash again because I don't want to risk them seeing him! One part of me feels like I'm doing the right thing, because he's happy here, and I strongly suspect that he was not happy before. The other part of me now feels like I'm stealing him, and that's a horrible feeling!
Well, I'm sorry to have made this SO long..... I guess I just needed to vent, and I am SO CONFUSED, scared to death, and just don't know WHAT the h*** I'm supposed to do!
Any advice or opinions here would be SO appreciated!

Thanks,
Starr