Narcissism has a technical meaning that isn't so much to do with the conception of narcissists falling in love with their reflection.

'Narcissistic personality disorders' are ones that are thought to arise in response to a particular childhood developmental process being interrupted. Narcissistic / borderline personality pathology are both thought of as 'narcissistic' disorders. I guess their relation to the common notion is that when one is emotionally freaking out... one gets kind of caught in the freakout (reflection) such that one isn't really able to refocus on other things (e.g., reality test, focus on others etc). Both disorders are thought to arise in response to a lack of 'mirroring' / 'validating' responses from others. I guess borderlines tend to seek emotional validation while narcissists tend to seek mirroring...

It passes...
Freakouts come...
And while they are upon one it seems like ones whole life is just one long extended freakout with no remission...
But then they go...
And one starts to think 'there is nothing wrong with me, nothing wrong at all'
And then they come back...

Coming and going...
Over and over...
Hard to remember that they pass.
But they DO pass.
And they become less frequent over time
And they pass more quickly over time
And one can learn little things to do to help one get through without %#@&#! things up TOOOOOO bad.
At least... That is my experience.
I hope it is the same for you.
Hang in there.