I am a 21 year old male, weigh 205 pounds and am always thirty and need to go the bathroom often. Do you think I have diabetes?

From what you have described, you may have diabetes. Being overweight is a risk factor for type 2 diabetes. 

Moreover. feeling thirty and increased urination also go with diabetes. The first thing you should do is see your doctor and get a blood test. 

You can check your urine for sugar but this really is meaningless until your diabetes has been confirmed. In the meantime, start cutting down on your weight, eat less sugary foods and change your diet.