It's possible and common to be happily married and in a healthy relationship with someone you love deeply and who also gets on your nerves sometimes for very specific, but also very human behavior.

Loving someone means loving all of that person, flaws included. We accept the little annoyances because overall, that person adds more to your life than they take away. Acknowledging this fact of human relationships is one way to embrace those flaws, and thus, that person.