His face that common meh? 
Ask yourself, do you find it hard to forget because you still blame
someone for this incident? Either you are blaming yourself or you
are still blaming him?
You gotta learn to put this episode behind. You have so much more
in front of you. If you let this incident ruin your life from now
on, you are not strong at all. Not strong how to survive in this
world?
Learn how to let go and forgive and forget. I know it is
traumatizing, but it is over and done with. Learn from your
mistake, you have so much more to face in the future.