1. Different values, dreams and goals
2. Different levels of commitment/ hopes and expectations for the relationship
3. Being too incompatible/ having few interests in common
4. Dishonesty/ having secrets
5. Lack of trust / betraying trust
6. Imbalance in emotional needs/ level of support both wanted and given
7. Communication problems
8. Being unloving, disrespectful, rude, uncaring, unforgiving or mean.