Marriage is something you need to know before you get to it and you need to understand that your life will never be the same when you will marry the girl you love because when that happens, you gonna do everything to make her happy and comfortable.
The risk in marriage is getting married to the wrong person, most people nowadays get married for the wrong purpose not love, is either because of money, beauty and so on. Which it will come to a time when those things might not be what you need anymore. Marriage is a beautiful thing, one just have to choose his or her partner wisely, because marriage comes with a lot of responsibilities, one just have to be prepared all round.
The biggest mistake that anybody can make is marrying the wrong person, the kind of spouse you have will go a long way to determine your happiness or sorrow, so it's very important to know the kinds of qualities that you want in a marriage, although it's not possible to get a perfect partner but let the person poses some important qualities that you need. I don't think that reasonable person will go into marriage with the intention of divorcing their partner, but unfortunately the rate of divorce in our societies is on the increase now, couples no longer tolerate each other's shortcomings, and very little matter that can easily be resolved will lead to divorce.
Couples with children needs to consider the innocent children that they brought into this world before considering divorce, because these will not experience the joy of being raised by loving parents. Inasmuch as I don't endorse divorce, a partner is better of alone than remaining in a toxic relationship.