Your destiny was written 50,000 years before Allah had created this universe.
This means that your marriage is predestined as well as your provisions, your job, your health and sickness and your death as well.
Whether you bang your head everyday against the wall or you are patient and content, your destiny is going to be the same and unchanged.
Therefore, be content, patient and positive and Allah will give you more than what you need and even more than what you deserve