See. All you have to do really, is forget.
Take a moment in your life, a person you met, an idea you thought... and keep telling yourself you never experienced, met, or thought, of that certain thing, in that moment in time.
if you can convince yourself, and everyone around you, that what is true, is a lie... than soon enough, they will believe you. And if you can continue to lie to yourself, sooner or later, you could fall for it too.
That is how you forget..
w.s. < (this signature is fraud, I wrote all of this myself unless i say otherwise, you will find out later on, who this "signature is)