It is really hard to make a life change alone. You need support, and a partner to keep you accountable and motivated. This can be a friend, or your spouse, or someone you meet at the gym or at a Weight Watchers meeting.
One of the best ways to aide success is by getting your spouse on board with you. It is extremely hard to stay focused and motivated if they are not on the same page, eating the same food, or have the same goals. Approaching a fit and and healthy lifestyle with half of your team not on board is not going to work.
So find a partner and use them to lean on. Set goals, work out together, cook together and most importantly, trust them with your struggles so that they can help you through.