People are very complex. Marriage or any relationship for that matter is hard work. It really is a mess we make of things due to a variety of factors.
But if you focus on you you will attract people (maybe your WW maybe someone else). But if you focus on you you will realize that you deserve to be treated with respect as well.
But what you describe as your W being closed off may hide a deep depression or fear. You cannot look inside of her. Who knows WHAT she is thinking? But I can tell you this much: IF there is a chance for you two to reconnect and she is interested she WILL keep an eye out. She WILL notice changes about you.
So control what you can control and that is YOU. I know...I know...that is easier said than done. But there are no downsides to that. Only upsides.