Ann, it seems to me that losing the weight for an event, like your one son's wedding and now your other son's graduation, isn't working for you. Because the event comes, and when it passes, all **** breaks loose. I think you need to find longer-term motivation, something that will stick with you day in and day out, without leaving you. You touched on it in your other post, maybe it's your soon-to-be grandchild and wanting to be a fitter, healthier grandmother so you can enjoy your time with him.
I suggest that you find an eating plan and an exercise plan that you can stick with in the long term, and then start taking baby steps to adopting a new lifestyle. The rewards may come more slowly, but hopefully will be longer lasting.
Good luck to you!