I eat everything i want. in fact i sometimes get stomach aches coz of eating so much.but why am i still thin?

Answer:
i was skinny too when i was 15-18. im now 25 years old and i'm 1,85 cm height / 81 kg. You dont have to eat too much; eat less but 5 times in a day, dont ever miss your main meal; breakfast,lunch and dinner..
Hyperthyroidism. The thyroid hormones regulate every aspect of your metabolism, from your heart rate to how quickly you burn calories. When your thyroid gland produces too much of the hormone thyroxine, you develop hyperthyroidism. This condition causes weight loss, even when your appetite is bigger than normal.

first; Go get your thyroid gland check.
and the second, Dont worry about everything, probably you allow anything makes you sad, if so;dont!
Sleep well,dont smoke,no alcohol, dont stay at bathroom too much (you know what i mean:)
this is a long way challenge,so be patient.

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because you have a very fast metabolism

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you have a high metabolism my sister is the same exact way wellme too but im not as skinny as her

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High metabolism. I used to do that too when I was a teenager and young adult. I have to really watch that now that I'm older.

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you might have a high metablism, that is your body burns off calories much faster than normal-otherwise cosult your doctor a physical and blood work might be in order.

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Some people have a metabolism like a furnace . . . they can shovel in the calories and still remain trim. It's a blessing .. don't knock it.

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