It is a hard slog to lose the old envy, the green-eyed monster still comes to you. Many years ago I fell in love with a Chinese hooker and it was a great way to learn about getting rid of jealousy, of ownership. We were together for over a year, but my worry, my cares for her safety, was killing her, and her worry for me was getting to her, we couldn't hack it in the end. I wrote Desert Loves 2 about it.
It took a while but it did stop my wanting to 'own' my partner. It was like immersion therapy I guess. We put ourselves through these pains, to test us. Well, those of a certain persuasion do!!!
Good luck on your journey through life Sarah. Keep experimenting, pushing your conventions to the limit.