You’ll find that there are a lot of things on the marketing course that you can apply to real-life situations. One of the most interesting lectures I have had was the first lecture of Relationships and Services Marketing. Commitment is the strongest predictor of relationship length when controlling for intimacy and passion. So how do you make a relationship last? There are three determinants of commitment: satisfaction level, quality of alternatives, and investment size.
If Hannah is satisfied with her relationship with Bob, Hannah will remain in the relationship. The higher the satisfaction level, the higher the commitment. Satisfaction increases when benefits increase and/or costs decrease.