Practice Self Kindness And Understanding
An essential component of saying goodbye to the narcissist in your life is to be kind to yourself in the process.
During your time together, he will have broken you down repeatedly and left you doubting yourself, your beauty (inner and outer), and your ability to function without him.
Just know that you are deserving of more. You have a strength that has been hidden in the shadows and all you have to do is learn to summon it again.
It will take time; more time than it ever takes to move on from the breakdown of a healthy relationship. You will have to give yourself some leeway and know that hard times are ahead and that they will test your resolve.
But kindness to oneself is a powerful thing; the more you practice it, the more it takes hold within your heart. You should be acting out of kindness towards yourself each and every day until it becomes natural once more.
Rebuild Your Self Image
The narcissist in your relationship will have tried to shatter the image you hold of yourself and remake it as he sees fit for his purpose. So when you leave him behind, what you see in the mirror could be very different to that which you saw before you met him.
A part of your healing will be to rediscover what it means to be you; there will be some additional scars inflicted by your ex-partner, but your inner self will eventually shine again.
It may take professional therapy or it may just be something you achieve with the help of your loved ones, but picking up the fragments of your true self and putting them back together is important if you are to avoid similar relationships in the future.