I have Money but hate spending money?

I'm not sure if this is a problem with me but I have money and i hate spending money. I'm only 15 right now and i've been reselling iphone and ipod on craigslist for the past 2 years. I made a couple grand. I have everything but $100 in the Bank. But everytime i have to spend money even on food i make every dollar count. Like if i'm buying food at restaurant i would save the $1 and not buy drink. A lot of people in my school spend $5-$10 on food everyday and i probably spend $3 at most. The only things i would buy without hesitate is stuff i'm gonna resell. Am i doing something wrong?

You are doing fine, great in fact. That is how wealth accumulates. Few people even know how to do that, and have the discipline. Many people who saved a lot of money hate spending, and will closely watch how they buy things.
There's nothing wrong with skipping a soft drink and having water.
The other people are probably not going to have a large bank account. They might have plenty to spend now. You will have more later. Appreciate your sensibility.

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