How can I loose weight?!

The best thing for you to do is increase your Metabolism. How do you do this you might ask?
Well here are some:

Increase Water intake:
Most people are dehydrated and don't know it It is said the human body requires 1 gallon of water a day just to function properly.

Change your diet:
People these days eat ridiculous amounts of processed foods. Try to cut down your intake of simple Carbs such as pasta, breads, and starch foods because they retain a lot of water and they cause insulin spikes which = weight gain/retention.

Increase Your amount of meals per day while decreasing portion size:
Small meals throughout the day work wonders on your metabolism. Your body is like a car it has to constantly have fuel in it. So if your body constantly is digesting something that means its constantly working. Keep in mind though that the meals have to be small here is a sample meal plan for the day... (This was yesterday for me)

8am:
Two large glasses of water, a banana, apple, and orange for breakfast
10am:
Two large glasses of water, 1 hard boiled egg with 2 small sausage patties
12pm:
Two large glasses of water, Fresh Spinach, pineapples and deck of card sized turkey
2pm:
Two large glasses of water, Fresh Spinach, pineapples and deck of card sized turkey
4pm:
1 cup of sea salt mixed nuts, Tea
6pm:
Two large glasses of water, Chicken Breast, corn, green beans, baby tomatoes :)

****This is the Paleo Diet Research it

Exercise:
Your best bet is either cycling or running
As far as exercise goes the only thing you have to consider is your heart rate. Your heart rate determines what type workout you perform. Your 17 so your Max heart rate (MHR) is about 200

L1 Low intensity 60-70% MHR (120-140)
L2 Dead Zone 70-80% MHR (140-160)
L3 Lactic Acid Threshold 80-90% MHR (160-180)
L4 VO2 Max 90-95% MHR (180-190)
Anerobic 95-100% MHR (190- MAX)

L1 This is where you want to be L1 targets fat reserves and when performed should be done from 1-2 hours 5 times a week
L2 This is used for recovery and sustainment of fitness after injury it basically keeps you at your current level of fitness
L3 Increases the amount lactic acid your muscles can hold. Interval training is usually done at L3 with rest intervals in L1 should be done once a week
L4 Increases lung capacity should be done once a week by working out 30 sec in L4 via fast run then 60 sec L3 via jogging
Anaerobic increases muscle mass and strength due to lack of oxygen to muscles ex. 16 100meter sprints done once every 2 weeks

Vitamins and general:
Take them your body needs them lol and get 8 hrs of sleep so your body recovers properly

Whey Protein:
Whey protein has high biovability meaning your body use almost all of it and whey before bed keeps your metabolism running over night

I hope my advice helps ya bud :))

Use to weigh 234 with 28% body fat
Now I weigh 205 with 16% body fat
Research is power my friend so don't just take my advice for granted look it up yourself too