Im 17, and right around 171 pounds without shoes on. Im 5'4 and im a boy and i have a hard time sweating which dissapoints me because i feel im not doing enough in my workout when i know im getting tired.

I have a treadmill, usually i run on it for a full length of 20 minutes, like this:
6.1- 1 minute 6.2- 1 minute, 6.3 1 minute, 6.4 1 minute, 6.5- 16 minutes, that equals to 20 minutes and in my treadmill is 2.00 miles. Thing is im not sweating hard enough and i dont understand why cause im not in that great of shape.

I mean for a boy whos 5'4 and 171 pounds, i should be dripping sweat, im tryna get down to 151 pounds but i dont know how im gonna lose all this weight by January if im not sweating enough, HELP please.

sweating is just water weight loss, and assuming you replenish the sweat you lose (ie, drinking water) your weight should only fluctuate a pound or two down and then right back up throghout that day and the next. What you need to concetrate on is fat loss, and the 3 ways to do that are eat very healthy, run often, and lift weights. You might try to run a little longer, try for 3 miles this month, maybe another .5 or 1.0 after that. How often do you run? whats your diet look like? ever lift weights? need lots more details to determine what the limiting factor is in your weight loss problems.

I usually run about 4 times a week. Mondays, Tuedays, Wednesday, and Sunday morning cause thursdays, fridays, and saturdays i work.

But i usually just eat corn flakes for breakfast with 2 percent milk, i eat a fruit for lunch, and it depends on what my mom cooks up at 5. I dont know what it is, but usually after im done running i dont feel like eating nothing cause i feel like all that work i did on my treadmill is gonna go to waste if i eat something. So i just stick to salads, fruits, tuna, wheat bread, and corn flakes.

wowsa! Im not genius but I know you need to eat a meal after you work out. A lot of people on this forum may whip up a quick post work out shake which contains a lot of protein, I do it, its great. Dont just eat NOTHING after you work out.
I know you need a more decent eating plan too. I try to eat a carb and a protein at every meal and eat more often throughout the day, not just 2 or 3 times a day.
Drink plenty of water!!