One of the complicated things about being a human is that we are constantly navigating, negotiating, and integrating who we once were, who we are today, and who we are becoming.
How we relate to our past, present and future selves is an essential element of overall happiness.
There are three questions that you can ask yourself to improve those relationships.
Past: "How can I forgive myself for the past?"
Present: "How can I accept myself as I am right now?"
Future: "How can I envision who I want to be in the future?"