A year will give him time to be alone and get accustomed to single life and living on his own again, which is an important transition.
Also giving him a year to get himself together will also ensure that the relationship between him and his ex is officially over.
Have you been wondering how to date a divorce (male), and have a successful relationship?
This is not the position you want to find yourself in during the relationship, as it will not only cause you a lot of frustration, but it will frustrate your partner as well.
Nor should you feel, in an manner, that you are being compared to his ex-wife, nor should you try emulate her. He is interested in you for who you are, not who you can become - least of all his ex. Try not to get into lengthy conversations about the relationship he had with his ex.
If it is not, he is not as good a man as you hope he is. There's enough chaos in this situation for everyone. The kids are already dealing with the divorce of their parents, and they may not be ready to meet Dad's new girlfriend.
It's important to remember that most kids of divorced parents, still hold out hope they will get back together. Allow the relationship to grow stronger, and more secure, and then you can develop a relationship with his children.
After going through a divorce, the last thing anyone wants is a new partner introducing new problems.