Most Helpful Guy
After a relationship ends most times the dumper feels just as bad, sometimes even worse about the situation. Yes, they can miss you just as much or even more, especially when they don't hear from you for long periods of time. This also depends on the breakup situation, if it was cheating, if they have a backup etc.. If it was mutual then this is totally possible, if it was "In the moment" during a fight then I'd say yes too. People do dumb things when they're angry, it's best to clear your mind and only talk when you are not angry/fighting.
Most Helpful Girl
No, i don't believe that because in a lot of cases the feeling isn't mutual.
People often say that if you miss someone or think about them , that person is also missing you too or thinking about you , but that's just a phrase used to provide comfort for those missing someone. It doesn't mean it's true