If you are married for the first time and in a marriage crisis and if things are getting hard and discouraging, you might be thinking that starting over with someone new might be the way to go – please think long and hard about the statistics that are shown in this post https://stubbornpursuits.wordpress.com/2010/04/26/divorce-statistics/
One of the quotes that I remember from Divorce Care is that it takes one year to recover and be ready to think about a new relationship for every four years of marriage.
Something sobering to know is that a high percentage of divorced people do end up remarried, and as you can see in the other post, that is very often not the path to happiness.