He has mood swings every few weeks. He loves me one day and talks about the future, and the next day he needs a break. He hates confrontation, and gets defensive when I try to discuss the things he says but doesn't mean.

It is too hard to diagnosis disorders over the net. What you describe could also be borderline personality disorder. I would suggest talking to the family doctor and getting a referral to a professional so proper treatment (if needed) can be done.