Balloons with photos of memories tied to the bottom is a sentimental and thoughtful proposal idea. Let her pop all of the balloons to find the ring. You can fill the rest of the balloons with sweets, glitter or flowers.
Card making: This I LOVE U card would be great for Valentine& Day or just to tell someone you care. Print the template and cut the solid lines with a sharp knife. Don& cut the dotted lines. Those are there to show you where to fold.