Maybe we are wrong. We should be thankful that we still feel hurt / pain from our past love. Because that's mean we still have feeling, we still have emotion, we are still human.
No matter how hurt it is, how much we wanted to forget it, just a tune can bring us back to where we used to be. We shouldn't run away. We shouldn't immerse ourselves in that state. We should feel thankful instead. We should be thankful for who we are now, thanks to our past experiences / love.
Recalling might not be the state of still in love. It's part of the memories that we will remember.
Instead, we should just walk through it and be glad for the past bringing us to the present.
We can't reset our feeling nor our memories. We can only create more of it now to make up the lost we used to have. What gone are now gone. We can't do much of it. You can remember it and use some ways to let what you want to say / do reach the "person" or "past". But never choose to stay at the same spot.
They say time heal. It doesn't actually. It buries. It hide. It just help to make up the lost but doesn't replace.