Intelligent people ignore...Yes. Let it go, and move on with your life. Then amazingly one day you realize you haven't thought about that negative situation, or that jealous, vindictive person in like forever, and you think, "WOW!! What was her name.
Ask yourself this when someone says you can't do it. What's holding you back? Exactly. Nothing but them and you, but only because you are letting them.
Dear Self. You know what they say about perfectionism...don't you? Why you don't have to be perfect, and in fact it's necessary that you don't try to be.