I agree with expanding your horizons. I was once like your ex - 5'6" 118 lbs actually underweight. Now in my 60's I weigh considerably more. Personally I think about 140-150 looks best on my frame and I'd like to get back down to that.
But what's interesting is that as I gained weight, I may have become less attractive to my weight-nazi ex husband (who could not enjoy food much) but much MORE attractive to men of color, who apparently didn't find my skinny underweight 20-something self nearly as attractive. It's been a revelation to be adored for my curves by every partner since my ex. Apparently there's something to be said for nice boobs and a great rear view. And I've discovered the true reason why men like to let a woman walk ahead of them
And like Ginger, I'd rather have a guy with a somewhat imperfect body who can enjoy life, than my fit surfer ex who couldn't enjoy a bowl of ice cream once in a while.