You know you've played too much Skyrim when...you take a break and find out that 12 hours have past since you started playing.
You know you've played too much Skyrim when...you go to do something and "press x" comes to mind.
You know you've played too much Skyrim when...you refer to real life money as septims.
You know you've played too much Skyrim when...you refer to cats as khajiits and lizards as argonians.

