No one can change a person, but a person can be the reason someone changes.
You can change the place you live, your clothes, your interests, your friends, your religion and even your partner. However, if you forgot to change your mind, attitude, beliefs about the world, how you treat people and how you plan to be different this time around, why did you even bother?
Nostalgia has a way of blocking the reality of the past.
Forget what hurt you in the past, but never forget what it taught you. However, if it taught you to hold onto grudges, seek revenge, not forgive or show compassion, to categorize people as good or bad, to distrust and be guarded with your feelings then you didn't learn a thing.
Never find fault with the absent.
If you wish to be loved, show more of your faults than your virtues.