Most Helpful Guy
Even when you do the breaking up (you are the dumper and not the dumpee,) you are ending a chapter of your life and admitting that a relationship was a failure. Even with a very bad relationship, obviously there were good times and things that you will miss. Finally, it is easy to have doubts about whether you are doing the right thing and feelings of guilt are very common after a break up. Ending a relationship is like having a death in the family.
Most Helpful Girl
Because you cared and thought he would stay and now your just dried and depressed.