I need some advice on how I should act when there?
Easy. This is a chance to sit down and state your requests in terms of what you want. And that's it. So, figure out what you want from the divorce and then be prepared to compromise on unimportant things and stick to your guns on important things. This isn't the opportunity to talk about how you want to be with her still, why you are a good match for her, or any other relationship stuff.
How should you act? Confident, put together, strong, funny (yes, you can even joke around at this), and know what you want. Make a good impression. Look good, smell good, be polite, be understanding, listen. Don't drag yourself in there like your dog just died. You won't save your marriage by looking pitiful.
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
