Some people are insecure. A long time ago, before I started dating my husband, we were in a discussion with several of our co-workers. He made the comment that women gain weight when they get into a relationship and become comfortable with that relationship and they lose weight if they are on the market looking for another guy or become insecure in said relationship. Perhaps that is his problem? But realize it's his problem, not yours. Keep your eye on your goal/prize and don't let him break you down. You can do this!