How many times have you been fooled? For me, I think the count doesn't exceed the number of my fingers. Although that's the case, the feeling of losing something you value is regretful.
The first time I was fooled was back when I was taking up elementary education. I was playing arcade there then someone sat near me and after playing then I just realized that my wallet was gone. I just saw my wallet on the ground. It was open and my money was lost. Good thing it was just a hundred bucks.
My next experiences happened when I was working already. I lost my whole bag and 2 phones after falling asleep on my way home in a bus. I got my netbook stolen at McDonald's just before a flight to a vacation. I also had my IPod pick-pocketed during a rush hour in the morning at the train station.
But nowadays there are many ways of being fooled. Sometimes it's done right before our eyes. Not too long ago, I've experienced paying something due to a friend's recommendation. And later I found was not a good deal at all. And yes, I've spent including the maintaining balance of my account. It is really a pain.:(
Sometimes we need to learn the hard way to learn things. Though you lost something, you've earned good experiences that would be really helpful for us to deal with situations like this.
So cheer up. Today it might be remorseful for you, but in the future, it will just be something to laugh about. :)