Thanks for choosing health care magic for posting your query.
Unfortunately there is nothing called compulsive talking disorder
formally. It could be a type of personality type that he is having. If you are having problem with his behaviour, you should talk to him direclt about what is causing problem and also offer to meet a psychiatrist
with him to rectify any relationship problems. In that case he wont feel offended.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.