It depends on whether the proposed changes are really necessary.

The process of two people together needs constant running-in and mutual accommodation.

If you really feel that the other person needs to change, such as some bad habits that will affect yourself and others, then use your ability to persuade him, influence him and make him realize that he really needs to change.

If it's just something you don't like subjectively, but it's actually harmless, it's best not to ask the other party to make changes. That will make the other person feel passive.

For yourself, it is best to calm down. You are not responsible for him as a whole. The most important thing for everyone is to be responsible for themselves. Don't deprive him of his responsibility.