Sounds like getting a kitten or at least another cat with the same engery level will be a good fix. It's not too much of stretch for a two month old and a five and half month old kitten to do great together. My 2 I just got the male has been in the rescue since he was a kitten when he was one Zoey was was rescued and she was semi feral and took an imediate liking to Killer and they have been the best of pals since so if a 1 year old can do great with a kitten I don't see why 2 kittens couldn't get along.