One of the common reasons for relationship failure is the lack of effective communication. Work on your communication skills to build a long lasting relationship.
Blaming your partner for lack of understanding is easy. Arguably, we pass the blame even though it is our mistake to deliver the message. This action may contribute significantly to poor communication and the relationship collapse.
When my wife and I got married, we could not understand each other the way we do now. I used to blame her for not comprehending my message. Instead, I came to realize that I was not delivering my message right.