Getting to know a person in a romantic relationship is a gradual process. Over time, you learn more and more about them, including their likes and dislikes, and how they think. Later on in a relationship, maybe you've wished your partner could read your mind and know what sets you off, and what you respond well to.
The concept of the five love languages is probably not new to you. The idea is that we all give and receive love differently-and those different ways tend to fall into five different categories. Where we get tripped up and disconnected, particularly from a romantic partner, is when we give love through our language but they receive love in a different way.
It's quite rare that a romantic relationship is easy or simple, especially as time goes on. There are often weird, arguably unhealthy habits that we develop, because we're human and maybe that's just something that we do. But you can fix them.