Gambling to me is just for fun because I know I won't come out ahead. I may have a good day or a good week, but overall I know I will lose.
It means you are enjoying your losses ? When you are ready to consider gambling for fun then I believe you should never bother about your losses.
When you are calculating how much you are spending for gambling then the definition for gambling in your mind will changing over time. Just spend least money in gambling for finding fun with it then you will never worry about your losses. That least to money is nothing but the money which is within limit of affordable to lose.