Don’t go back to your ex.
You can read a book as many times as you want, ends the same way every time. It’s extremely rare to ACTUALLY change, it’s hard, that’s why most don’t. Most can change for a short time but eventually they’ll revert back to default
Someone said that even if you take a really good shit, you never shove it back up your ass because it’s not gonna feel good… basically even if it ended well it doesn’t mean you need to try to force it back.