The door closes when it closes. You don't even notice. As long as you aren't putting life on hold waiting from some action from her, then who says the door needs to be forced closed.
Keep moving forward with your life. If you want to see her and date her, then fine. If you want to date other women, that's fine. It's your life. Live it how you want. As far as your ex is concerned, it's really up to her to ask about trying again (which she may never do...she may hang out with the comfortableness you represent until she finds someone else and then you're history....can you handle that?). What you control is whether you want her as a part of your life or not. As I said above, you could be a stopgap until she finds the next "soulmate".
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
