If you have a username like mine!!
(only a joke)
or if you start to act like Vincent, Cloud, or Firion.

you check your yard for Chocobo tracks

you're scared of riding a boat because a gaint monster might attack you

you begin to sing the Hymm of Faith at church

when you become enraged at your pharmacist because he/she looks at you like you're crazy when you ask for a high potion.

When you sneak into a cemetery with a bag full of feathers
...too morbid?

You know when youve played to much when you try killing a dog with a football pretending to be Wakka.

You know when youve played to much when you try killing the strawberry jelly in the fridge thinking its a fire flan.

You know when youve played to much when you begin wearing trousers with one leg shorter than the other.

You know you play too much FF when you imagine yourself as a FF character.

you tell your team that it's time to 'mosey'