My comment will likely be quite biased as I tend to despise jealousy and anyone's trying to own another person, especially their personal feelings. I very much agree with other posters about setting more solid boundaries but also think that the H's jealousy is not valid (unless therapy becomes something else than therapy) as far as using it as a means to control. I would definitely tell someone like that they need to figure it out and deal with it themselves and would boldly refuse requests for not having my art in my home or not being able to explore the described methods of self-soothing and self-care. Some people get very irritated, jealous etc when a significant other compartmentalizes relationships and demands transparency that gets in the area of intrusion with a partner. I tend to be very sensitive to that and would draw a very firm line. I guess OP's style is quite different, which is perfectly fine but, the way I see, it reflects a form of push-pull - maybe that is a good topic for therapy. The many layers of ambivalence around sharing, how much, when etc.