I have worked with many clients in unhappy relationships and it is hard when one half of a partnership is trying to work through their issues and the other is not so willing. There is much to work through, but many times clients can recognise their present situation has much in common with what they experienced growing up. Some are very surprised to see the same traits they disliked or were afraid of in their parents to be the same in their partner. They may not realise it, but they have an opportunity to do something different that their parents were unable to do.
Exploring the family, you came from and the kind of relationships you had is the first step. The second is to understand you were a child and had no control over what happened to you. You had no choice but to trust your parents and hopefully you had parents that loved you and were doing the best they could. It is to approach a situation with kindness and empathy rather than all guns blazing.