From my experience the comments made by "Jolly Girl" hit the nail on the head and would only add that being in-command is not just about flying the aircraft. And CRM does not absolve you of any responsibilities as Captain.
If you own leadership skills lack the ability to deal with this co-pilots attitude then take it to your fleet manager or who ever is in overall charge of your operation.
Personality clashes left unresolved only lead to an unsafe flight deck.
