You move through life too quickly.
Marriage brings many changes: along with the ring and new last name, it ushers in a new, more responsible, phase of life. Some young couples regret jumping into this stage of life, because they didn't fully understand what came along with it. Unfortunately, there’s no jumping back, and you might have to accept that you went through life a little too fast. Marrying young takes away time you may have spent in your 20s travelling, dating different types of people, or learning who you really are as a person. Some people regret giving up that fun stage of their life, and that can lead to resentment towards the marriage. You might eventually see it as something that holds you back, rather than something you can grow with.