Congratulations on your terrific progress. I've lost a similar amount of weight with SP, and as I get closer to goal, I am excited about maintaining a healthier lifestyle. Since you've been with SP and WW for so long, you are persevering. Creating a Spark page, joinging a few teams, and blogging have all helped me so much.
You might consider joining a team or two if you haven't already. It's a great way to meet people with similar interests. Good luck and keep Sparking!