(((PaintTheRoses88))) - I'm sorry it so painful to see your BF suffering and I'm sorry he's sick. I agree your BF needs medical intervention. Has he ever had therapy or tried medication or has his family ever taken him for help?? Is he willing to look at web links? I think the wise thing to do - would be to talk to his family and tell him he needs to visit his doctor and you/family will take him.
There's a good book called 'My Life In Rewind' by Dr. Micheal Jenike written about Edward Zines the famous football player who's life was consumed by OCD. He literally wasn't functioning at all and he would have to count to 1,500 perfectly before he did anything. On some Edward Zines on Good Morning America a few years ago and he said Micheal Jenike changed his life for the better in a drastic way.
Your BF needs to be stabilized first because there is no reasoning with him ATM. It doesn't matter if you/anyone makes perfect sense it won't register in his mind. Here's are some links for the book and OCD and I pray your BF gets the right help:
http://www.capecodonline.com/apps/pb...335/-1/NEWSMAP
http://www.harpercollins.com/authors..._MD/index.aspx
http://www.mclean.harvard.edu/patient/adult/ocd.php