Swami Mukundananda
How do I stop thinking about my ex and let go of the attachment?
Don't just give up, redirect the attachment
Every time you think of giving up an attachment, the thing comes back to mind and the attachment only increases, like trying to stop thinking of a jalebi (a sweet). Don't just give up, attach yourself to God.
It is not just a question of giving up. It is a question of developing loving attachment to God, and that is karma yoga.