Lead to the proposal with passion. Bring passion everyday. Not just on the day of the proposal but, the days, weeks, even months leading to the proposal. If one day you show your passion for her that is great but, if everyday you show it then it will be even more real to her. It’s a build up of layer on layer of passion till the big day. Special little things that show you care, random messages that tell her you’re thinking about her, thoughtful gestures that tell her she is on your mind everyday. Share your passion and show it to her. Let it build up to the day you propose. Don’t stop there, keep it up after. The day of the proposal lead up to it with passion as well. She will feel your passion and share i it with you.