There is nothing wrong with deciding to play a game -- if it is a conscious decision. And if the game catches you and you spend quite a bit of time playing it? There is nothing wrong with that either, provided that you don't skimp on necessary acitivities such as basic hygiene, caring for your pets and work commitments.
If, in retrospect, you are appalled at how much time you spent on the game, then maybe it's a good idea to set an egg timer or something.
Just don't complain about it -- it was your own decision to play the game that long!