How long did it take to completely detach from your DA? It's been a year no contact

I know this person was not emotionally available, not mature enough to build something with. But they were extremely important to me (best friend for a decade turned to lover, platonic relationship).

I thought I stopped hurting but in fact it turned into constant anger and if look through the anger it's deep sorrow and grief from losing this person. They were my everything.

I thought a year would be enough but it feels like so little time passed. I left because I wanted to give myself a chance to heal, find happiness and find someone available.

But here I am thinking that it's way better to stay alone and only live for myself, deeply broken and full of grief. I dont even recognise myself sometimes because of the amount of anger (not only because of that person but our story made my whole world collapse and I lost important people).