"All relationships go through hell" suggests that no relationship is exempt from facing tough times, conflicts, or trials.
"Real relationships get through it" underscores the idea that authentic and strong relationships are characterized by their ability to weather these storms and emerge stronger on the other side.
In essence, this quote encourages individuals to recognize that difficulties are a natural part of any relationship, but what defines a true and lasting connection is the capacity to work together, communicate, and support each other in navigating and ultimately overcoming these challenges.