Accept What Is and Learn from It
Life is a university and you never graduate. Accept that whatever happens to you, no matter how terrible, is there to teach you. Your job is to learn and do what you have to. It is not so difficult to move on if you focus on learning the lesson rather than lamenting your misfortune. It also does not mean you are callous or heartless. On the contrary, you will become much more caring and empathetic when you are not wallowing in your misery.