One of my favorite life sayings is "I know what I don't want". And that just comes with experience and failure. What most people don't want is to go into a relationship trying to change someone. If you do, the relationship is usually doomed from the start.
Compromise is good but trying to change someone to your terms or "fixing" them down the road is a recipe for disaster.
https://www.powerofpositivity.....com/cant-make-others
