Is a ferret okay without another ferret?

Ferrets can be okay by themselves - as long as they have plenty attention from humans and plenty of time out of their cage. My ferret is an only ferret after his cagemate died of old age at 9 years. I do not cage him, letting him free roam in a ferret proof bedroom, and I play with him a lot as he does demand my attention. If your ferret is going to be alone if you are away from home frequently, like for a job or school, then another ferret would be needed for companionship.