I am going through the same thing, but have 10 years on you. I wish I had gone through it sooner, not that it gives you any solace. It is a long, painful road tbh. Some days I take it day by day and some days I have to take it minute by minute. Lifestyle changes are an adjustment- I also had the house that I made exactly the way I wanted that was (in my mind) perfect. I am starting to cope with the mantra things are just things and they aren't what will bring you happiness.
I also went to live with my parents for 5 months, which I swore I'd only do over my dead body, and it ended up being better than I though. Helped me forgive them for any resentments I had, I saved a ton of money, and it was a better band-aid than immediately going to live alone.
This week I got a new job making substantially more and moved into my own place in an area I love. That's not to say it isn't filled with pain, because it is. But you KNOW you will get through it. I'm here if you ever want to talk.