I'm a 14 yr old girl 5"3 and 130lb
my arms are kinda flabby, i have love handles, i want a flatter stomach and i want to make my thighs smaller. also, does weight loss make your chest smaller?

You need to start exercising (try walking briskly around your neighborhood 30 min per day) and eating more healthy and less food. Start eating more fruits and veggies.
Weight loss will make your chest smaller if you have a lot of fatty tissue there. To know if you have a lot of fatty tissue, poke it with your finger. Is it very firm? Then that's muscle or breast tissue. Is is kinda squishy or yields easily? Then it's fat.

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Helpful Tips for weight loss:
1)A good way to loose weight is to use a calorie counter watch
Keep to a 1,200 food intake
Add 1,200 plus 3,500 (equals one pound of fat) ...and that is the total amount of calories you need to burn each day. Its actually really easy once you start watching the numbers and it doesn't seem like work or exercise. Its just a matter of changing the way you think about loosing weight.
I use this method when i gain some pounds. The first time I did this I went from 168 to 127
2) Most people do not get enough water in their system. Water is your body's principal chemical component, comprising, on average, 60 percent of your weight. Every system in your body depends on water. For example, water flushes toxins out of vital organs, carries nutrients to your cells and provides a moist environment for ear, nose and throat tissues.
Lack of water can lead to dehydration, a condition that occurs when you don't have enough water in your body to carry out normal functions. To determine if you are getting enough water use this simple formula.. Take your weight, for example 150 pounds and divide by 2. Take your answer which is 75 lbs and change it to ounces, in this case 75 ounces. That is how many ounces of water you need a day. Your body performs mostly on water. If you make sure you get enough water everyday your body will perform at top notch and your body will no longer have the cravings of junk food. You will have a better performing body system to help you work out and feel better thru out your day.

i depenes how tall are u again