Hmm... not really let go of the relationship, but, in my case, I
have totally ignored that person for 2 whole weeks until I got over
the whole incident more or less.
But, you will never know whether you have got over it unless you
see that person again! If by that time, you realise that evey
action he takes, have an impact on you, then, you are not saved
from the hook if by then, anything he says doesn't have much of an
impact on you anymore, then, congratulations!