Brother, you're learning a lesson right now. The former boss was too good and you got spoiled. Sucks to have to learn the hard way that most bosses aren't like that

You should apologize to her though. I know you feel too guilty to reach out, but you should still. Be the adult you should have been before and at least let her know that you regret it and miss her presence. Being fired messes with your self confidence, she needs to know that she was good