The key to any long lasting, satisfying relationship is commitment, openness and a willingness to be vulnerable and take emotional risks. Couples typically disagree over things like money, sex, trust, friends, commitment and their vision of the future. These are emotionally and psychologically loaded areas which bring into focus our deepest values, attachment needs and expectations.
The truth is that broken relationships don't just fix themselves. When issues in a relationship are ignored they will typically get worse until they are irreparable. If you have found that you and your partner are unable to have healthy discussions about these or any other topics, it may be time to seek professional help.
Some couples come to therapy with their relationship in shambles, as a last ditch effort before breaking up. Some have a strong, solid connection, but are in a state of crisis, going through a difficult period, looking for help and guidance on how to navigate it. Couples therapy is often very successful in facilitating open and honest communication and mutual empathy, thereby bringing a couple closer, creating a deeper connection.