From what u posted, I do not see OCD at all. Narcissism perhaps, anti-social personality disorder, etc. I am sure when u talk to a professional you will get a better idea of what could be going on with him. Medication can help greatly - for many diagnoses, but usually does not stop a chronic liar - and it sounds like he is one. Good luck to you, and I am sorry you are going thru such a troubling time !