Breakups hurt, but it gets better. Some part of you must have known your relationship to Aubrey had a time stamp on it. She is very young, and very poly, and the likelihood of a woman that age settling into a lifelong partnership with anyone, let alone a man decades older, seems unlikely. Let her go. You'll find other partners eventually, and it sounds like you have bigger fish to fry. You need to get your living and financial situation under control first. I hope you feel better soon and I wish you luck.