All about Ex's and Why's?

Why is it that some of us always have that one ex that is still lingering around while we're over here doing our thing moving on? Do we like keeping them around? Do we not went them to move although thats what we're doing? Or Do we just have that one ex thats a complete pyscho? "I need explanations"
*All stories are welcomed*
All about Ex's and Why's?
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