Relationships between a man and a woman fail for many reasons, and failure to communicate properly is one of the biggest. You will never fully understand your partner, and why they do the things they do, unless there is communication in the relationship. No relationship can be successful without communication. If you want to learn how to win back your ex, because your feelings for them are still going strong, improving your communication is going to be the first thing you have to do. This is even more important if the relationship crumbled due to a lack of communication. When I was learning how to win back my ex, I also had to learn how to communicate.