Fran ~ You've gotten some good advice here. I hope it helps. I've heard lots of folks say it takes longer to lose those last 10 or so pounds. One suggestion I would offer is to be sure you're getting some added fat every day - in addition to the fat in your food I mean. Just a few points a day will really help. A TBSP of real mayo, or butter, 2 oz of avocado, etc. Our bodies need fat - just not a lot of it.
Diamonda has the right take on weight training - IMHO. It does help your metabolism speed up as muscle burns more fuel. But more importantly, as women age they begin to lose bone (and muscle). Weight training will halt and even reverse this process. I for one don't want to be a little old lady with fragile bones like my mom, grandma and MIL. I can recommend Miriam Nelson's books
Strong Women Stay Young,
Strong Women Stay Slim and one other, the title of which escapes me. She also has a website which I think is
http://www.strongwomen.com She recommends only a program that will help you build strength and bones, not look like a bodybuilder. And muscle takes up less room than fat - you'll look slimmer whether or not you lose weight.
Good luck on those last few pounds!