No you don't need to break it down, she will have to disassemble it piece by piece. You can't do this for her. All you can do is turn broken tree into a fixed and renewed tree. You have to do a great deal of introspection, self evaluation, etc then correct the things that need to be corrected. Otherwise two things will happen, a) she'll never take down the wall and b) you'll end up repeating the same mistakes in your next relationship.
If we really want to love, we must learn how to forgive. - Mother Theresa