He will be fine, all my 27 are pets and were orphans, they are all very tame, some raised alone others in groups. They love the attention, but are also happy to just hang out with each other. just watch that if he is very small that the bigger one dont butt him. He needs some sort of mother for cuddles and it sounds like your it. I have found when they reach 1 year they go off in a gang and are not so interested in me, like teenagers, then they get over that and are really friendly again. Some of my boys were not castrated properly, and I had the vet desex them as older sheep (about 8- 12months) under anesthetic, quite full on for them, but they came through fine. They need pain relief while recovering. Not expensive. Its good to know this as some are not desexed properly with rings, and loved pets can become aggressive, so this is a way they can be kept. I had two stray rams turn up in my flock from the forest here, and they were scarey, but I got them desexed and they very quickly chilled out, they are huge but so gentle. Enjoy it, he will!