I am a big guy. And I know the reason why too - sadness (I don't want to say "depression" since I haven't had that confirmed). But it started with barely being able to eat because of sadness, and then starting to eat again, and then eating bigger servings and more cookies and candy and sugary stuff. And soda, and energy drinks. I did change my lifestyle too: my earlier years of skateboarding were gone, I wasn't going swimming due to time constraints, and I stopped going to the exercise place (kinda like aerobics) when I broke my hand... and never started again due to time and money.
Then I just grew and grew and grew. And disliking who I became lead me to eat more, for comfort. Sugar and food always tasted good, and was a safe space in my mind.
Eventually I plateaued at a certain weight, and from there, I am now working my way down again, by cutting some stuff, exercising more (5 minutes of exercise is better than 0), and the most important step in my opinion... What's that, you ask? Counting calories. Calories in vs Calories out.
This is such a good thing just to get a view of your eating habits. You'll see so clearly where the biggest culprits are. I did it before, but stopped for some random reason. Gonna pick it back up again.
I do have to say, I have always weighed a lot. I know the "big boned" thing is fake or whatever, but when I was skinny, I was still heavy. And according to BMI I have always been close to "overweight" when I was a skinny lad.
Now I am "super mega fat" or whatever according to BMI, but I don't care about that