I wouldn't tell it to her in the form of an ultimatum. More along the lines of "look, I understand you're unsure. But I need some kind of understanding too or else it just seems like you're using me".
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.