Living in harmony with your significant other requires joint efforts and understanding on both sides. Here are some suggestions that can help you build a harmonious relationship with your significant other:
Communication: Effective communication is key to building and maintaining healthy relationships. Make sure you're willing to listen to each other's thoughts and feelings and express your needs and expectations. Avoid criticism or accusations and instead try to communicate with understanding and respect. Respect: Respect the other person's personal space, opinions, and decisions. Respect each other's independence and autonomy and do not try to control or change each other. Mutual respect is the foundation of a good relationship. Understanding: Make an effort to understand the other person's position and feelings. Try to put yourself in the other person's shoes and show empathy and empathy. This will help to defuse conflicts and enhance understanding. Compromise: In a relationship, compromise is necessary. Learn to compromise on certain issues in order to better meet the needs of the other person. At the same time, you should also be clear about your bottom line and boundaries. Trust: Building and maintaining trust is a very important part of a relationship. Keep your promises, be honest and transparent, and avoid deception or betrayal. Trust takes time and effort to cultivate. Common interests: Find common interests and participate in activities together. This will help to enhance mutual understanding and connection, and strengthen relationships. Problem solving: When problems or conflicts arise, resolve them in a positive way. Avoid evasion or the Cold War, but discuss problems openly and honestly, and seek solutions. Working together to solve problems will strengthen your relationship. Gratitude: Be grateful for the other person's efforts and contributions to the relationship. Express gratitude and appreciation, and make the other person feel important. This will help to strengthen the emotional connection between each other. 
Keep in mind that everyone is unique, and there is no one-size-fits-all approach. Keep experimenting and learning to find a way for you and your significant other to get along. Most importantly, be open and positive and work together to create a harmonious, loving environment.