How much weight will you lose by starvation?

You'll be dead long before a year is up. If you think you need to lose weight, starving yourself is not the way to do it. Talk to your doctor about a reasonable program of diet and exercise. This is a good point made by this person. Talking to your doctor would be a good idea, but if you're too embarrassed, just change your lifestlye. Change your eating habits slowly. Say you have dessert every night after dinner. Cut back a few days or eat fruit and yoghurt instead. It's worth it, trust me :)