You and your partner have a good relationship because you know each other and can understand and support each other. The fact that you can feel each other's sincerity and concern when you're hurt may be because the emotional bond between you is stronger and can make each other feel comforted and supported. You might not be the only one who can understand him, and others might not understand him. Everyone had their own experiences and feelings. Only by truly entering his inner world could one understand his emotional needs. Therefore, the reason why you have a good relationship with him may be because you can listen to and understand each other and establish a deeper emotional connection.