<human>: Someone help me figure out how to help him. 

He went from 150ish to over 270lbs in a little over two years. He had some anxiety issues originally and went on a high dosage of antidepressants.  Since then he has been gaining so fast. 
It's to the point that I wake up at 4am to the sound of him making food in the kitchen. 

He eats huge portions, then snacks all day on chocolate and candy, then he actually wakes up at 4am from a dead sleep to hide in the kitchen and eat literally whatever he can get his hands on. 

I have tried to get him to go to the gym. I have started coming around making him healthier meals but its so out of control. What do I do! He gets super offended when I bring it up. 
I have tried to get him to go for walks and hikes etc. he just doesn't want to... 
He also works an office job all day, snacking all day on candy and junk food.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Boyfriend gaining weight at an alarming rate. Wakes at night to eat in the dark. Eats EVERYTHING IN THE HOUSE. Has gained over 100lbs now after always being a normal weight.