Food is the side effect, not the problem. It is filling in for something else, which you really want more. If you knew what it was and how to get it, you would do it and then you could just eat for hunger or to enjoy the taste. For now food is filling in as a substitute.

Short term, do you have someone you can trust to help portion out meals and snacks for you? Maybe someone who can help keep you motivated for some regular exercise?

Long term, you probably need to find what it is that is missing from your life. This isn't easy. Usually this is being kept from you by that place in the back of your own mind. Because part of you thinks it isn't safe to even know what it is that is missing. Usually it involves love, joy, and meaningful connections with other people. Usually it gives you a sense of purpose, and genuine healthy pride. These would be good things, but they can look dangerous at first. We're not talking about the part of your mind that can make reasonable decisions based on the facts in evidence. It is that place in the back of your mind which keeps you going over and over the same old patterns, and it thinks it is doing it for your own good. It is hard to fight that part of yourself and win. When you do win, the victory is often short term and followed by reversals. This is what people are talking about when they talk about parenting your own inner child. It is about getting that place in the back of your mind to get unstuck and move on, so you can have what you really need.

And your body represents your subconscious mind. The thoughts and emotions and anything you say out loud that you direct toward your body are going straight to that place in the back of your mind. That part remembers everything. Mindfulness training is a good start. If you start by seeing the choices you are making more clearly, and why, it is easier to stop and choose again.