O.J. Simpson's actually got some misgivings about his impending release ... he feels a bond with his comrades in lockup and is finding it hard to say goodbye.
O.J.'s lawyer, Malcolm LaVergne, tells TMZ ... Juice has been bored and sad in his current situation -- in an isolated cell for his own safety since he was granted parole in July. He says the decision was bittersweet for Simpson, because he's developed close friendships during his 9 years behind bars.