I'm used to miscommunication in manga but this one is more frustrating than most. They are constantly walking on eggshells around each other with how they're afraid of broaching any topic that's even slightly inconvenient for the other person.
But that's also not too unusual for a first relationship. In time, you learn that a good partner is someone you can bare your soul to and will be there with you through both the fun times and the difficult ones. "In sickness and in health" and all that jazz.