My dad was very reserved, often letting others do the talking and dominate conversations. He was also very meek and compassionate, and letting my mom have her way in many plans was something I only understood in my adult years. That's a story for another time though.
The point here is that most of his offsprings, perhaps with the exception of one took after his nature. We're naturally not dominant with conversations and most times clear cut communication of what we want is often surpressed in favour of the next person's. However, we are not saints either, and what I presume to be a character flaw has no right to cause long term unhappiness.
With my current relationship am learning to express myself a lot more. We talk not just about dreams, gossips but our clear cut expectations of one another. Initially it was had to come up with, but having someone who encourages you to be more intentional towards a relationship is a really big bonus.
I get now why they say communication is important. Honouring commitments is also important, but clear cut communication might be what provides the difference between a relationship being a burden and actually enjoyed over its course.