I think you handled the prior situation with this other friend very well. You honored yourself by being so respectful, and she is the one who dishonored herself by going off with all the f-bombs.
One spring and summer, I went through the final part of divorce, graduated from college, was accepted into graduate school, and moved half-way across the country. No husband, no local friends, tiny apartment in a town I did not know. I spent a lot of time by myself--at first.
Once I sort of got the 'lay of the land' I went out and explored the local area more, went to museums, festivals, made friends. Things really did get much better!
I think this will happen for you, too! Give yourself a bit of time. It has only been a couple of months, right? Is there something you have always wanted to try, art, craft, rock climbing? I think once you open your horizons just a bit and make additional friends, your whole world will open up!!
Sending hugs and good thoughts and prayers, S