There are 4 warning signs for relationships: criticism, contempt, defensiveness, and stonewalling. Criticism could look like "You never take me anywhere." Contempt could be insults and name-calling. Defensiveness could be making excuses. Lastly, stonewalling could be ignoring your partner and giving them the silent treatment. The article below can you help look for these warning signs and how to improve your relationship.
https://www.psychologytoday.com/us/articles/199403/what-makes-marriage-work
