40 pounds is not too shabby! And, if you exercise while losing, you might even look like you've lost more than 40. About 12 years ago, I lost 30 pounds and looked like I had lost about 50. I was doing at least an hour of cardio each day and doing some weight training.
I know its hard to do sometimes, but try to enjoy life to the fullest right now. Don't let the weight hold you back. I've let some great times pass me by over the years.....just because I thought I had to wait until I was skinny to enjoy myself. Sad, huh?
"Live the life you've always imagined." Henry David Thoreau