It takes time and practice, but it is very much within the realm of possible. It's normal to respond in a way we're used to. The first step is to look objectively at your actions and what they bring you. If you don't like what you're getting from them, acknowledge it's time for a change. And bit by bit start piecing together that change - the pieces of your life.
Many people keep replaying old events in their heads.
If only I'd done X, think of where I'd be now. But going back to a situation over and over only keeps you in that event - which is in the past. And it won't bring about the changes in you that the Universe is trying to hand you. Basically, it won't bring you any happiness. Waiting for someone to come and fix what happened is a waste of time.