Many couples acknowledge this at their wedding by having someone read from Kahlil Gibrans' The Prophet (1976).
In the passage on marriage, Gibran urges couples to have spaces in their togetherness.
"Stand together yet not too near together: for the pillars of the temple stand apart, and the oak tree and the cypress grow not in each other's shadow."
Gibran is describing healthy limits.
The opposite, enmeshment, is comparable to the oak tree and the cypress growing so close together that their branches and roots become entwined. Soon, there is no room for either tree to grow; parts of each tree die, and neither reaches its full potential.
Unlike compromise, which is a conscious give and take, enmeshment involves denying who you are or what you need, to please someone else.
Taken from the book Stop Walking on Eggshells. Mason & Kreger