The others answers are wrong AF.
It means that when you start caring about YOURSELF (or "fall in love") you will start seeking the best version of yourself (mental, physical, spiritual, etc) and once you are there you will have no rivals. It's not about love.
Making Narcissus falls in love with himself
What I think this phrase means is that if you obviously over excessively think or more like believe that you are beautiful looking or the best there is at something, or you can out compete somebody else in a certain subject, than that means that since you can "dominate" anybody else in that certain subject than you have no rival that can match you or be better than you at that subject. So, there is no worry for that person if they are that conceited. ANS 2: If you love only yourself, nobody else will have anything to do with you (there will be no rivals for your love of yourself).
he goes into to her room and watches her sleep.
it means that you were only concerned about yourelf. When someone says that you are in love with yourself it means that you only think about yourself
Hortensio and Gremio are rivals for the love of Bianca Minola in The Taming of the Shrew.
He is confused and needs to sort himself out.
Of course. There are no rules about who can and can't fall in love. Rivals for the same prize have a lot in common--a passion about the same thing. A attraction between them would be very natural.
He falls in love with the dragon.
It means "Love." becuse he loves only himself
her name is Jasmin and she is not a Disney princess because now she is married to Aladin which means now she is queen.
the symbol on garra's forehead means love before he fought naruto he swore to only love himself
once upon a time there was a greek god named narcissus. he was so in love with himself that he would sit and stare at his reflection in the pond. narcissus did not love anyone but himself. that is where the meaning of the word narcisistic came from. it means that you love yourself very deeply and are very full of yourself. therefore the term narcisistic supply probably means that there is no end to the supply just as there is no end to narcissus love for himself.