Once you learn how to accept the truth, no matter how painful it is, you'll stop wasting time on the wrong people.
Moving on doesn't mean you forget about things. It just means you have to accept what happened and continue living.
You can't change what has already happened. So don't waste your time thinking about it. Move on. Let go and get over it.
Let go of the people who dull your shine, poison your spirit, and bring you drama. Cancel your subscription to their issues.
The most difficult aspect of moving on is accepting that the other person already did.