Struggling to let this Cheater go…

He’s so beyond toxic to my soul. And yet , somehow it’s leaving is making my insides empty. He just recently cheated on me bc he felt I was doing him wrong. & I didn’t give him enough attention. Of course I was the one to be blamed and he even attacks me for still wanting others after he legit crushed my heart.

Trying to detox him from myself it’s so hard. He’s the biggest narcissist and he isn’t sad how bad he hurt me, bc he is still saying “ but what about me” and he cheated.

How do you guys get through this. It’s like a drug and my withdrawals are crazy but I know I deserve so much better and he’s a boy who doesn’t love himself.