You can lead a horse to water....

Unfortunetly for some it may take a health scare or soemthing else major before they decide they are ready to lose weight. And it does have to be something they decide for themselves they ar eready for an dwill commit to.

As for the insecurity, all you can do is stand by his side and love him. You can be a perfect model of a wife and never look at a man, never leave his side for a moment, or even blink, but if he gets it in his head to be suspicious he will no matter how little evidance he has. Just stand firm and reassure him. Maybe he'll get it after a while that you're not on the prowl

Men can have hard heads though and somethings take a while to sink in Then again I know alot of insecure women too that trust anyone or belive they are worthy of a relationship no matter what thier paortner does to try and prove themselves.