Penises often make men insecure. Valuing themselves because of a misshapen organ kept men from seeing how base they are. From understanding that the feminine is superior to the masculine.
Self-assessment will help you improve yourself, which could be useful in your future relationships. Even if your relationship is over, you can remain good friends and share your feelings. Since you both have been in a long-term relationship, it is obvious that there is a strong emotional connection between you. As you can understand each other very well, you can help each other in any problem as a friend.