Hey! Welcome back! Glad to see you have popped in again.
Fortunately, alcoholics do not have to figure it all out before they stop drinking--otherwise even more would end up dead!
It's the same for food in some ways, although obviously you can't just give it up. What seems to work for a lot of folks is to find a reasonable plan for eating that includes nutritious foods and controlled amounts. Not a plan that gives you so few calories that you're always hungry, because that's a setup for giving up.
You have many places to start, if you really want to. Have you consulted your doctor or a dietitian or nutritionist? Do you have Weight Watchers in your area? Have you read YOU: ON A DIET or other books on weight loss and nutrition? May people launch themselves into a plan that doesn't work for them for any number of reasons--it is too restrictive, it doesn't contain foods they want to eat, it involves too much preparation--it all depends on your lifestyle.
As for the why's, there are plenty of therapists who can help you look at what issues might be contributing. Some have a specialty in food issues. But remember, you can lose weight and keep it off without having to solve all your problems first.
Good luck! You can do this!
Jay