Seems your family is suffering under some mis-conceptions. #1 this is a quick easy fix NO IT ISN'T, it's a tool. You still have to do the work, work your diet, work your attitude, it's WORK. #2 We're your family, we know what's best for you. HA! How many times have they given you bad advice through the years? (This person would be great for you! This diet will work for you!, etc. etc.) The fact is, you are the best judge of what you NEED. #3 We know who you really are. (meaning your role in this family is the fat person we can dump on) This is rarely addressed straight on. Your misery makes them feel more in control, successful, better than you. Many times they are not conscious of USING YOU. You feel obligated to be the dumping ground because deep down you feel like you deserve it. YOU DON'T DESERVE IT, NO ONE DOES.
Bottom line: This is your time, your chance, your life. Decide to give yourself the gift of this coming year, yes, YEAR. You are investing in yourself, loving yourself, giving yourself a real true LIFE.
I wish you the best, I wish you success, I wish you a happy Snoopy dance!