I already wrote some articles about narcissists vs empaths and how these personality structures relate to Love.
The thing is, that most of my readers and people who get in touch are energetically sensitive souls aka empaths. They do by nature always think about others first.
It's their natural state to take on the worry of the world and they are the insecure side of god consciousness.
The fact, that you worry to go over the edge shows very clearly, that you are also in this category. A real narcissist would never be afraid for this to happen, because he would not think in this categories in the first place. This thought would not come to his mind.
I would say, in cases like yours, that you can dare to go all in on self-love and you don't need to worry about ever going into a place of overconfidence.
This is what narcissists should do... So love yourself as hard as possible - the world will thank you for that! ❤️🙏