Apologizing..

Hello there mylotters! ^_^ Does apologizing always mean you are wrong and the other is right? Well, for me, it's not! Because me and my boyfriend always argue some stupid things before. During those times, I always say sorry to him. But, it doesn't mean it was always my fault. I just value our relationship so much than my personal ego. Still have one question..Why is it so hard for some guys to say sorry?