- you skip school/work and lock yourself up in your room just to watch anime and/or read manga, VN
- you already chose watching anime, reading manga or VN over hanging out with "friends"
- you are only emotionally alive when watching anime, reading manga, VN, and get apathetic in the real life
- you are only attracted to the 2D world, as well as not interested in 3D girls anymore
- you refer to girls in real life as 3D girls, and reality as 3D world
- you start saying things in Japanese unintentionally
- you can only communicate with other people if it involves anime, manga, VN
- you often make anime references when talking to someone
- you have to read aloud in class, and you accidentally read it from right to left
- you see a maid in real life and wonder where her cat ears are
- you have to write an essay, you try to come up with something that's related to anime
- you know that the plural form of anime is anime, and of manga is manga
- you have a problem, you think "what would XY do..?" (XY=favourite character from anime, manga, visual novel)
- you know more about an anime character than your family
- you've spent more money on anime, manga, VN than on your other stuffs combined
- you stop seeing anime and manga not as a hobby but a life style
- you're about to go to bed, you say "just one more episode", but end up finishing the whole thing
- you actually bother reading everything I've just written, and realize that you're an otaku