Is it normal at 17 to wonder why?

I am 17 i am male, and i always am getting depressed because all my friends have more than i do. they all had it easy and got what they needed, while i always had it hard and didnt always get what i needed such as dental care and what not. please tell me what i should tell myself to get over this
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There's more pride in earning what you have than having it given to you.
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