Okay so lets start,

You know you fail at Kingdomhearts when kairi leaves you and goes for Riku.

You know you fail at kingdom Hearts when everyone but Xemnas dies

You know you fail at Kingdom Hearts when Roxas notices he's a nobody right after he's himself as a ghost looking at Sora after he defeats Xemnas.

You know you fail at Kingdom Hearts when Roxas destroys Riku

You know you fail at Kingdom Hearts when Sora cringes at water after the battle with Demyx, the Olympus Colosseum one

You know you fail at Kingdom Hearts when Ventus comes and kills you

You know you fail at Kingdom Hearts when Kairi said "WHERE THE HELL HAVE YOU BEEN!!! I HAVE BEEN WAITING FOREVER AND YOUR THE WORST POSSIBLE FRIEND OUT THERE YOU JERK!!!!!!!!!" to a picture of Sora in Castle that Never Was to practice for the real Sora

You know you fail at Kingdom Hearts when Ansem/Riku comes and gets pwn'd by Roxas

You you fail at KH when you cosplay as Sora on a school day. Without pants.

You know you fail at Kingdom Hearts when Ansem comes after you because you fail so much

You know you fail at KH when you try to use your miniature Kingdom Key as your house keys.

you know you fail when sora nukes all the worlds because hes scared od heartless

You know you fail at KH when you think that Sora will save us from 2012.

You know you fail at Kingdom Hearts when Roxas shots you with magic

You know you fail at Kingdom Hearts when you try to hit Kairi through the t.v for getting too close to Sora.

you know you fail when u fall in love with kairi and namine *guilty*

You knwo you fail at Kingdom Hearts when Terranort kills himself because you fail so much (wait didn't he go that)

You know you fail at KH when SK3 enters KH world and still trolls you in the games.

You know you fail at Kingdom Hearts when the actors come to your house and beat you up

You know you fail at Kingdom Hearts when Kingdom Hearts come out of the t.v and slaps you across the face

you know you fail at kingdom hearts when you die before donald.

You know you fail at Kingdom Hearts when Riku and Sora actually kill themselfs.

You know you fail at Kingdom Hearts when Donald criticizes you on your melee attacks

You know you fail at Kingdom Hearts when the lingering sediment proceeds with Terranort to kill you. (My god that would be scary and Terra and Xehanort working together would also be suprising)

You iknow you fail at kingdom hearts if you can't tell the difference between kairi and a moogle.

You think moogles were original to Kingdom Hearts.