Relationship are hard work no matter what

[Money & Muscle]

In a relationship, if it is going to last, the relationship must be the highest priority.

I agree with what you're saying, but expecting someone to value something that does not bring them short or long-term happiness, is not a winning recipe.

I think individual happiness on a macro - long-term scale should be the highest priority, and that this happiness should heavily overlap with the relationship these people are in; the two (individual happiness and relationship) should be able to coexist and compliment one another.