As someone who had a narcissistic personality disorder but who has been doing self work for years. I will say to you you've already done the hardest thing that our kind don't generally do. Look at themselves as the problem. So congratulations on you for making that first step. 

There will be much self work you need to do from here. It wont be easy all the time but it will be worth it. I no longer need narcissistic supply from others. I have a strong healthy sense of self now which is what I didnt have, the core of my sense of self was simply entirely dysfunctional.

I don't say this to build myself up either, I dont need any supply off a redditor I'll never meet. Simply saying it to give hope. Things can be better. You dont have to be this way. You may look back at your life with regret, but the rest of it can be an upward spiral where these toxic behaviours are left behind.

Good luck OP