Can I lose weight on a 100 carbohydrate diet?

So for starters, I'm 6'5 and 270 pounds. I have been down to as low as 225 but am gaining again. My friend did some research and found out the health benefits to eating a high protein high fat diet. He is much smaller than I, but has lost 35 pounds this year. He limits his carbs to 20 a day, which is pretty standard for that diet. He's been trying to convince me to do it, and I finally decided it was a good idea after watching the movie Fathead (a little amateur but highly recommended). I'm wondering if i throw in the occasional breaded chicken or potato, limiting to about 50-100 carbs a day, would I still lose weight? Would I still have to count calories or could I still treat it like the atkins diet (ie eat as much fat as I want and only limit carbs)? I've done the atkins diet before, but it's hard to stick to for long periods. I try and exercise with Basketball, Frisbee and Badminton 2-6 times a week depending on the weather. My metabolism is extremely regular and fast working, since I am 22 years old. I also take Attention Deficit Disorder medication, which has the side effect of increased metabolism and hunger suppression, which has always helped when I've decided to diet. Thanks for reading and I'm willing to clarify anything!