POLL: Would you talk to someone if they costantly lied and blamed it on their Bipolar Disorder?

Someone I know SWEARS that he knows celebrities. He goes into detail about which ones (Olivia Munn, Jessica Biel, Tom Cruise). He's supposedly known Munn since college, had lunch with her and Jessica Biel, and used to work with Tom Cruise. Every time I simply ask a question, he hits the roof and gets all defensive saying why don't I believe him? I usually just laugh when he does that. He then says sorry my diabetes and bipolar disorder caused me to treat you this way...forgetting the issue of how it sure as h*ll seems like he lies a lot. I have gotten advice from many people, either on the Internet, or in person. He is connected to everyone I know. There are only 2-guys that have said things like this to me, I got away from the first one, and the first (not this one) actually used photo shop himself into the photos (very good editing job btw). The guy I am currently mentioning paints such a detailed picture you feel as if you were actually at the table with and he and the celebrities...which I am pretty sure they don't know Tom Cruise either. But, they could have met him..just a 40-something year old man with women in their 30s seems creepy. I've been trying to ditch him for around a week and he won't go away. Now he's telling everyone he doesn't want to talk to ME to beat me to the punchline. What should I do?