It would probably help to have no contact awhile. Like with a break up. And to make friends. Friends to share joy with and talk/laugh about the stress of life. What are your hobbies? Join a group or take classes that reflect your hobbies? Build a life that has nothing to do with her. After awhile you will find that you can go hours then days without thinking of her.
I had an unhealthy attachment to my ex and all this helped me. Aswell as traveling and realizing that there are So So many amazing beautiful people in the world. So many that obsessing over one is sort of silly. Because then I miss out on all of the other beautiful people and things out there..
It took awhile. It'll take awhile of distracting yourself and finding other interests.