Try different kinds of holistic healing techniques
I've had many losses throughout my life and I can attest that alternative healing has made a huge difference for me.
What I have tried and has worked: Reiki, theta healing, sound baths, yoga, meditation, tapping (EFT), shirodhara, breathwork, aromatherapy and massage.
And there are many more healing techniques out there. Give them a try and if one doesn't work then try a different one.
If you don't want to do it alone, for some of them like yoga, meditation or massage, you could invite a friend to join you.