Leaving a relationship, especially one that is a long-term relationship, isn't ever easy. You might continue to hold out hope that the person will change for the better so that any issues are dissolved. While this isn't impossible, it is probably unlikely. If the issue that is plaguing your relationship is abuse, you might be putting yourself in danger by staying in the relationship.
We understand that you might be too scared to leave your spouse. This is a normal reaction to an abusive relationship, especially if the abuse has been ongoing for some time. If you are thinking about walking away, you have to think about making a plan that will keep you as safe as possible.
One thing that you can do is to learn about restraining orders and how one of these orders might help you to remain safe. A restraining order sets a limit to how close your ex can get to you. While this doesn't put an actual barrier between you and your ex, it can give you a legal basis for taking action if your ex comes within close proximity to you.
Leaving an abusive ex is something that you have to think carefully about. You need a place to go and a way to support yourself. If you have children, you also have to think about them. All of this puts considerable stress on you.
We can't take away the dangers of you leaving or the stresses that come with it. What we can do is enable you to make plans from a legal standpoint that can help you remain somewhat protected.