You really should be talking face-to-face as much as possible and I do not understand why you are sending e-mails in the first place. It sounds like you two live and work far away from each other and in that case I believe you are doomed anyhow.
But yea just leave, a conflict like this just gets worse and worse. Specially when one of the parties in the conflict doesn't realize there is one. If you really believe in this business you could always take in outside help but I believe that is your only chance to fix the actual issue.
If you aren't prepared to do that, run.