I'm not sure what the situation is with your husband, but first and foremost you must understand that the only way you are going to be successful is if YOU want to do this. I'm not sure how tall you are, but staying in the range of 135-145 sounds relatively healthy to me.
However, if YOU really want to lose weight, you can do it!!! You can put in the work and the effort and make your dream a reality. BUT if you are trying to fit into some ideal that your husband has in his head, then you will find it a difficult uphill climb I'm afraid.
Take some time to decide why you really want to do this. If you take your husband's thoughts out of the equation, are YOU happy with yourself the way you are?
Best of luck to you on your journey....