I'm sorry you are feeling this way OP 
I'm not sure how similar your ex is to mine (he's only been my ex - this time - for 4 days)... at first I decided I was a Love Addict and he was a Love Avoider... this was a 'brilliant' discovery as it looks like there may have been hope... but...but I had an enlightening moment thanks to threads like yours and the link put up by @OldandWornOut
I started delving deeper into the narcissist characteristics and found this dude:
www.youtube.com/channel/UC_P8aFACl-VqJl0flQPGMQQ/videos
... and my epiphany is, I'm an empath and my ex is an introverted covert narcissist. He had controlling tendencies, like if i didn't reply to a text in a certain amount of time I was quizzed relentlessly, who was I messaging, constant silent treatment for perceived bad behaviour, taking everything I said as a slight against him and saying i constantly criticised him, what about his feelings, the list goes on.
Now that I am accepting I am partly to blame - not for his behaviour, that's on him and only he can help himself - for being an empath - thinking the more love I showed him, the more he'd love me back - I'm researching ways to improve myself.
Not to get him back, that's a lost cause, but to make my self strong enough NOT to take him back or want him back.
I hope you find your epiphany soon!