I'm fine with her changing to improve on mistakes.
I'm talking about changes that aren't even related to mistakes.
For instance, she does everything I do. She insists that it's also something she likes, a hobby of hers... something she loves/enjoys doing.
Later, she starts complaining... "Hey, I followed your hobbies. I followed the things you enjoy doing. Therefore, you should follow my hobby to make me happy!" Whoa, where did that come from? She insisted that she liked those things and I was simply happy that she liked those things. Now, she's using it against me as if she never liked them in the first place and changed just for me. If I had known that she had different interests, I wouldn't have gotten her involved in my interests.
Another example would be... she always buys me gifts. I tell her that she doesn't have to, but she insists that she wants to because she loves me. Later, she gets mad because I don't get her "enough" gifts. If I get her something big, then a couple months later, I get her something small... she gets mad and starts thinking that I don't love her any more or I love her less. Gee... the size of the gifts determine how much I love her? *groans*