A/N
OMG this has to be one of the greatest examples of the stereo typical "cool-guy-who-knows-he's-cool" ever invented
Okay so you have Echo (yes the name has a purpose you'll see)
Echo is your basic average girl not too pretty not ugly either but she is not the kind of bimbo girl that usually hangs around Narcissus telling him how handsome and strong he is.
Any way so she falls in love with Narcissus of course and tries to you know talk to him or something and he basically tells her to buzz off because she's not pretty enough for him well she runs off crying and eventually fades away till only her voice remains and is doomed to forever repeat the words of others in canyons and the like (Hence where the Greeks thought Echoes came from)
Aphrodite watches all of this and decides to punish Narcissus for being mean to Echo. So she leads him to a river and as he looks down into the water she has her son shoot him with a love dart and BAM! He falls in love with himself and then he eventually faded away and f lower grew where he had been and that flower was a Narcissus and that is why when people like themselves too much it's called Narcissism.
A/N this is the shortest one I've ever written