I am so overweight I can’t even look at myself anymore

I used to love my body. I was fit without being really active. I had room in all my pants and I was okay with my body. I wasn’t skinny but I was okay with how I looked. I moved back home with my family and I immediately gained so much weight. I feel disgusting I like genuinely hate the skin I’m in but I feel hopeless. I’ve resorted to eating a single meal per day until I can get whatever is going on with me under control. Now that I work in the office everyday, I don’t have it in me to go to the gym or do anything after work. These days it’s dark at 3:30pm and freezing so I just come home and curl in bed. Sometimes I look at myself and imagine a knife just slicing all the fat off my ginormous gut. I truly hate myself and I feel stuck.