Problems:
When one or both people is very self centered.
If one person is a neatnik and the other is a slob.
If one person is lazy or or not easily motivated while the other person is high energy dynamic go-getter.
If one person is needs a lot of physical and emotional romance and cuddling and holding hands and the other person doesn’t need or like that kind of romance.
If one or both people use sex as a weapon and withhold it to punish the other person.
If one of the people loses his/her sex drive and the other person needs to have a little or a lot of sex to be happy.
If one of the people does all or most of the household chores, while the other one does not.
If one of the people constantly whines and complains, but never does anything to actually solve any of the problems, or worse yet, gets angry at the other person for suggesting solutions to some of the problems.
Resentment from one or both of the people in the relationship, for just about any reason.
Not being willing to go into counseling when serious marital problems arise.
When one person is irrationally jealous.
When one person is actually doing iffy kinds of things that would make most rational people jealous with good reason.
If one person has some type of addiction, whether it be drugs, alcohol, porn, video games, or whatever, and the other person is unhappy with the addiction and wants the other person to stop engaging in the activity or to get help with overcoming the addiction, but the other person refuses.
When one or both people refuse to talk about important issues like money management and child-rearing and how often to have company over with each other, then proceed to go about those tasks in ways that seem wrong/bad/inconsistent/dangerous to the other person.
When people find out that their ideas about money management and child-rearing or how often to have family over, differ wildly.
When one person becomes sick or disabled and the other person is not willing or able to take care of their partner.
When one of the people treats the other person as less than equal.
When one or both of the people often say mean or degrading things outright, or if they say those things and then try to suggest that it was “only a joke” or that the other person has no sense of humor.
Passive agressive behavior from one or both people.
Outright agressive behavior from one or both people.
When one of the people regularly acts like a boor in public.
If one of the people regularly ignores the other person, whether by not listening to them when they talk or going against any ideas or suggestions the other person makes, or not being interested in what is important to the other person.
When one of the people regularly stares blatantly or flirts with people, or has inappropriate conversations online or at work, even after the other person has told him/her how un-comfortable it makes them.
When one or both people treat the other person’s friends and family members like enemies.
When lots of other people tell you that your partner is a real douche bag.