Missing

Hi All,
Well, it's been close to two weeks now that our Sampson has been missing. Of course, I feel horribly responsible. At the height of frustration, I put him outside after he had peed for what seemed like the millionth time on our clothing and carpet. There was presumably a medical reason for this (crystals), and he got plenty of medical attention and special treatment around here. He had been on medication (3rd round) which helped him temporarily in the past and a special diet that was supposed to cure him. Still, it didn't stop.
Anyway, I didn't want him to run away, or wander off and get lost, or simply not come back. I didn't expect any of that to happen. Blanca and Cue didn't have issues coming and going outside as they pleased. Why would he? He stayed outside at my parents' farm for months. He even had jaunts of days away and returned. He had a collar with our phone number on it. So, I spent the first week waiting and fully expecting a call, telling us to come pick up our cat.
What's kind of weird is I have literally taken no pictures of him (the few I have are from my mom). It's like somehow I knew he would be a short-timer with us. The kids thought he was barrels of fun, and he was a real cuddly guy, which I enjoyed. But he really rubbed Blanca the wrong way, and he seriously got in Riley's face too (nothing she couldn't handle). And I won't mention how many times he "disregarded" Riley's bed (a favorite target!) And maybe this sounds silly, but I hate the fact that the last time I saw him I was angry with him.
I don't know; maybe we just weren't a fit. I still look whenever I am walking and driving out around the neighborhood. I'm hoping the fact that he hasn't come home means he found a nice place to settle in. Perhaps he wandered and someone else took an immediate liking to him, so much so, that they did not want to return him. Perhaps he is living in one of the barns nearby and enjoying an outdoor life again. There is one very close by that I highly suspect. Maybe "missing" to me is simply "relocated" to Sampson.