Talk to him about it, but be prepared to walk away. You don't say how experienced he is, other than you are moving to this together. It may be that he believes he is doing the "right" thing without fully understanding the responsibility that goes with being a Dom. If you can talk it through then this may just be a blip along the way. If not - then you should leave and quickly.

The line from MrJerseyGuy "I love hurting her..but never more than she loves being hurt!" is very close to being perfect. The only thing I would add is a need to push the limits of a sub, but that must ALWAYS be done with care and understanding of both her needs and limitations.