Do you repeat destructive patterns of behaviour in your relationships? (gentlepsychologist.com)
Psychologists are particularly interested in understanding patterns of behaviour as well as how people think about themselves and other people, and how they respond when they experience strong emotions. (psychlopaedia.org)
Also, watch out for patterns of behaviour where as soon as you start to get serious, he'll pull away and become less keen. (welovedates.com)