I find memory can be a beautiful thing yet a curse. It holds precious things from your past, victories, happiness, etc. But it can also hold your failures and things that have hurt you. Keep the good memories close and forget the bad ones.
Life is too short to wake up in the morning with regrets. So, love the people who treat you right and forget about the ones who don't. And believe that everything happens for a reason. if you get a chance- take it