If you did work things out, would your next years be like last year? If you are sure they would - remembering that you can never be 100% sure, then maybe it wasn't a great M.
If you think that the more aware and independent you would find ways to live as married married people instead of single married people, then your H is wrong about thinking your marriage would never be happy.
I remember you mentioning that you don't like to work the room with your H. Maybe if you are to stay M, you would need to change that aspect of your shyness. Would you be able and want to do those kinds of things?