My partner would sometimes  react strongly to a situation and it would catch me off guard. Over time we learnt to talk about it once things calmed down and it helped me better understand her triggers and how i can avoid them.

I realised over time that not all conversations are meant to be discussed logically, some are purely emotional e.g my partner feeling jealous when i speak with a girl is an emotion and I shouldn't try to explain it logically. This change made things so much easier for me.

We realised that division of household chores makes everyone better off. Over time we figured out what each one of us is good at, what we each love/hate doing, and then arranged accordingly.

I unknowingly started expecting my partner to be a reflection of myself, often asking "why can't you also" when pointing out things I do. But I realized that he brings his own strengths to the relationship, and expecting him to mirror me is not fair or healthy.

Building open, clear and safe channels of communication in your relationship not only removes the stress and distance of guesswork, they also bring in fulfilment, empathy and a real chance of growth. Remember, no matter how well you know your partner, you can't read their mind.