Ugh! I know you know it already, but you have a fantastic life (except for your current injury which will get better) and your affair partner is stuck with your very scummy ex. Plus shes a hoarder. Enough said.
I smiled when I read your past few posts because I kept thinking, "Wow she is a classic extrovert! She should be around lots of people at this time" I think I am a mix of both, but i remember feeling the same way when I was on maternity leave. I went to work injured cause I could not handle being home without structure or socialization.
It will get better though.
I have fantasies too about being on a date, when I am out. I dont even have a crush on anyone, so it makes no sense. But you are not alone in that. Its normal to want a companion to share nice times with.