You are not who you were in the past or who you think you will be in the future. You are who you are now.
Whether in this lifetime or another, memories might conjure up pleasant feelings or perhaps uncomfortable ones. Embrace the happy moments and send Love to the rest. You are a different person than you were in the past, and whatever you did or however you were then, is what brought you to where you are now.
Imagine you are embracing and comforting your past self. Take the pain that you once felt and send it up into the Light, so you do not have to experience it again.