Show her.
Not with noise. Not with hollow pledges. Not with midnight long speeches written when feelings are strong but acts are quiet.
Show her, always.
Show her how you wake up and manage your obligations. Show her how you realize your vision even when nobody is applauding. Show her how you control your rage when you might easily burst. That kind of strength speaks more strongly than love.
Don't argue if she doubts you and don't beg if she misinterprets you. Expand. Let your discipline respond to questions your tongue cannot.
If listen closely; this is essential. Do not “show her” to impress. Show her because that is who you are. Your build up will fall apart the moment you feel disrespected if it's only for attention.
However, if your development is genuine, if you sharpen your focus, build your work, safeguard your serenity, grow your character, you still win whether she leaves or not.
Show her the updated edition of yourself. Not louder either.
That's a way to show her.