My family has always taken in strays, rescue animals, or pets being passed around to new homes. ALL of the rescue animals turned out to be loving and loyal pets, after they'd been given time to acclimate and to heal. 2 of the dogs had been abused to some degree, and had problems with the flinching and not wanting certain parts to be touched, etc, that eventually were overcome when they trusted us.

Once he really knows and trusts he's safe now, I bet you won't be able to find a more affectionate friend.