Forevermine, I can't see any hint of a proposal in there.
Your first post on this subject was two years ago. You've been experiencing frustration about his lack of proposal for quite some time now. I suggest that it's time you dump any pretences of wanting a surprise and talk about this like grown ups. None of this "I'll do it when I'm ready" stuff from him! This is your life and your fertility we're talking about here. You should absolutely have a say and the timing and planning of your life.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.