Your RL friends and your DB friends have all given the same advice. It's hard to know how hard to try. If she wants to continue - she'll reply positively and try to make time. But my guess is that she enjoyed the time with you but got cold feet when she realized you wanted more.
We learn something from everyone we encounter - some of it good, some of it not so good. Remember - the first person we want to be with after the divorce is usually not the lasting one. But it all happened for a reason. It pushed you out of your comfort zone and helped you remember how nice it is to have someone else in your life.
I'm not sure I would have sent the note but then - I'm not you. I really think subtlety is a better way to go in the dating world.
Hope things continue to move fwd for you with or without MM.
