1. They Value Different Things in Life

2.  They Don’t Get Along with Eachother’s Friends and Family

3. One Person Cheats on the Other

4. One is Much More Ambitious Than the Other in their Career 

5. They Grow Apart

6. They Couldn’t Handle the Long Distance

7. One Person Looses Trust in the Other Person

8. They Had a Hard Time Finding a Compromise

9. One Person Was Violent, Possessive or Controlling

10. They Didn’t Have a Strong Physical Attraction