You are doing great! And you are not the only one fighting the same battle. I'm in the same boat with you.
My DH is eating everything he wants whenever he wants. My DSs are both over 6 feet tall and 150 pounds or less. You can only imagine the amounts of food they put away. On the plus side for me, everyone is old enough to cook their own meals. I cook for me. They eat it or they don't. If they don't, I have left overs. They see that I am working hard to take off the pounds and are very proud of me. Saying they are proud is thier way of showing it. No one is helping with the shopping or cooking. I keep telling myself this is about me and what I want from life. Not about them or making anyone else happy but me. Keep YOU in mind when you are cooking for your family! Stay focused on your goal. You really are doing great!