Om Swami
How do I accept a break-up and stop blaming my ex?
Accept it, and meditate to quieten the mind
Chances are you subconsciously knew from day one that the relationship was not because of a bond or love but was a convenient transaction. Just because you have changed your mind does not mean the other person is terrible. Meditate until your mind quietens.
Now you have to accept it. Just because you have changed your mind does not mean the other person is terrible. It is you we are concerned with.