I think sometimes, especially in Western culture, people have this idea that grief is inherently bad for you. That it's unnecessary pain. We even have a phrase for it being "too much": "wallowing in grief."
I'm not well versed in grieving practices in other cultures. But I do know that in a lot of other cultures, grief and honoring the past, honoring the dead, is seen as a good or even essential part of life.
And this extends to Western-culture-influenced beliefs about system things, like system collapses, systemmate death and dormancy, and fusion, and introjects missing their source.
I just want to remind y'all that grief is okay. It's healthier to grieve than to bottle up unpleasant feelings. And grieving is a process all people go through, if you just live long enough.
And it IS a process. It's even a healing process - the mental and emotional wound must be given time and space to heal.
So yeah. Miss who you were, who you used to know, places and people you used to have, things you SHOULD have had but never did. Be sad for the losses. Cry, tear things, make shrines to remember them by. It's okay.
You'll grow, and remember, and learn. Give yourself grace, and give yourself space to grieve. And if you can, let people in your life be there for you as you grieve. Because one day, perhaps, you'll need to be there for them when they grieve.
And just remember, it won't always hurt this bad forever.