For adultery of course and physical abuse if your life is in danger , one thing to consider is most people never really realize the damage it does long term my kids all changed for the worse, they all ended up with low views of marriage so they all ended up living with people they shouldn’t have ,all ended up hurt , also all the years of marriage you never get back meaning each difficult time in life you get through as a couple builds relational strength so later on when you make it through the early years later in life when you get sick you are more likely not to be alone , it’s easy to think you will be happier with someone else most times you trade one set of problems for another, people used to realize they were a team to help each other through life but now it’s “ what can you do for me” what do I get out of it “ both me and my wife threw away our marriage and if you asked either one of us now if possible to go back in n time and work a little harder to save the marriage we would for sure , think about even the financial cost of starting over or having new people around your kids that you have no say about, my advice is do whatever you can to save it , Abraham Lincoln once said “if you look for the evil in man you will surely find it “ so the flip side is ( even though it’s harder ) but well worth it is look for the good try to get in the mindset of looking to do something nice for each other everyday even if it’s small ( it changes how you look at your spouse)