Life becomes easier when you learn to accept an apology you never got - Robert Brault some people need to learn morals and manners. When you're wrong you're wrong accept it and do something about it. If not it doesn't matter life goes on.
One of the keys to success is passion. If you care about something or want it naturally you won't need to force yourself to work on it. The passion will be your fuel. Only work on things you are passionate about.