Well, I would adopt him to a home that already has another cat or kitten for him to play, groom and cuddle with. That may be all he needs. Little kittens do not like being alone.
In the meantime you can advertise him as a "Love Sponge". People love this type cat. We just adopted out the suckiest, loveydoviest (is that a word??) attention demanding cat in the world, and 18lbs to boot. Everyone wanted this cuddlebug who demanded constant attention and would NOT take "No" for an answer!
Easier to adopt out a love sponge than the type of cat who hides under the bed for a month and hisses at you!