Responses
It's a reasonable thought, and makes sense. It doesn't matter if you've been with someone for 10 years or 30...when a problems arises, sometimes they don't get resolved as smoothly as one hopes because everyone is acting in the moment. It's not like they mentally prepared for it. Even platinum couples can still fight over silly things. The reality is also once you turn 20 your personality is already solidified and it's hard to change unless you make a conscious effort.
Part of me thinks that the reason why they can't really solve this problem even if they already dated for 10 years is basically because during those years, nothing really happened in their relationship? In simpler terms, there were no (male) crushes involved in their 10 yr relationship pso they dint really know how to approach the situation. You can't really just know the other person's thinking just bc yall lived together for a decade or so, at the end of the day, a person's reasoning can be wrongly rationalized. But hey, I've yet to be in a relationship so idk