Lots of options. 1. Talk to him about it. 2. Make it more difficult for him to talk to you (put headphones on) 3. Decline working in the same space as him re

Lots of options. 1. Talk to him about it. 2. Make it more difficult for him to talk to you (put headphones on) 3. Decline working in the same space as him regularly because "I really need to concentrate today".