Your career has ended? That seems extreme. Something wonderful will come of this.
I know that taste well. It subsides, but you might be in the thick of emotions so early on in your new independence.
I found it easier to make friends among my ex-co-workers after I left - while working there I felt very alone. Turned out they liked me quite a lot for leaving, and for making my reasons for doing so very clear.
Leaving is the best thing when you feel spiritually stuck in a place