One of my ex-bosses used to say:

Breakups are cruel, but they teach us for life and form our character.

I'm happy that you're in such a balanced situation. Mine is very similar.
Many people don't have the chance to change their lives from one moment to the next. If you have a family, for instance, and don't just need to feed yourself, you have to act very carefully. Quitting a job can be a financial risk, and a lot of people can't afford that.