I think possibly that it was because you didn't actually discuss with him, just told him in passing what your plans were. These plans will have a major impact on both of you so I guess that he is unhappy that you chose not to discuss such a major decision. Your actual wording was 'that I mentioned in passing to DH that I was going to give up work and study full time.' Having supported you thus far I guess/imagine that he feels sidelined. I don't really know how you move on from this, apart from acknowledging his feelings and maybe trying to see things from his perspective??
Baby Reindeer - anyone watched it?
Last weekend, in Rutland, the first statue in Britain of the late Elizabeth II was unveiled.