URGENT! HOW CAN I HELP MY BOYFRIEND AFFECTED BY OCD?

hI,
it's 5 years I'm with a boyfriend who has the OCPD:obsessive-compulsive personality disordeR.
many people who have this disorder usually show it in hygiene (they wash their hands 50 times a day). My boyfriend instead shows this disorder in every aspect of his life! He has been to different psycologists, he actualy started a medical treathment 3 years ago which only got him worse! he has been to 2 different recovery centres but no one has been able to help him.
it's impossible to make him understand that he's destroying himself. he thinks this disorder is the only solution to his life and he's afraid of living without his compulsions.
i would like to help him but I've got no idea how! has anyone had direct experience? can anyone give me advice?