Many people, when they get married, think that they will live together forever, but then many things want to separate them. It can be cheats, miscommunication, career problems, and problems with the health. Many things influence on our relationships.
To avoid the separation, you should be sure in your choice before the wedding, firstly. If you have any doubts, you should not marry at all. Because all your doubts will be realized in problems later.
You should have a strong wish not to divorce. If you think before the marriage that you can change your mind any time, you will change your mind for sure. You should think over it and make the correct decision. You should not forget about the thing that another partner will suffer because of your changes.
Also a good example is the example of your parents. If you see that your parents live together happily and for many years, of course you will do everything to be together with your behalf.
If you really love each other, try to be together forever and be the example for your children. 
