What should I write in the love of my girlfriend's birthday? 520 sentences ~

There may be tens of millions of people telling your girlfriend the sweet words on the Internet. How would your girlfriend feel if she saw that what you told her was used by many people? Girls have a little 1 vanity. You certainly hurt her by doing this (you can cling to it, just know ...........), so please think of a unique one (it can be sensational, pure, direct, euphemistic, metaphorical and so on). I'm just a child and I don't know what love is, so what I said is incomplete.