How to make a Leo change his mind?

Hii! As the title says, my fiancé is a Leo and he is very emotional and sensitive.

Like he will get incredibly sad and disappointed super quick. For example, I told him I like my own time at home because my parents are always on top of me and he got sad because he thought that when we get married I’d be the same. I’m a Tauro but I don’t usually make things about myself when I’m upset or I don’t make a big deal out of something small.

I want us to be in the same frequency in terms of attitude and make him realize sometimes he is wrong.

How to achieve this?