Adding another wrinkle, it is not always that weight gain is the turn-off, it is the reaction to the weight gain, especially for women.

My wife is about 60 lbs heavier than when I met her. I don’t have a problem with that, and i still desire her sexually. What bothers me is that she has transformed from someone who enjoyed being nude to someone that runs to the bathroom to change because she doesn’t want to be seen. It clearly affects our romantic life and therefore our overall relationship.

If I were to ever be single again, I’d be looking for someone who is body-positive even if they are overweight. Wearing a bikini even with a tummy? Good sign. Wearing a shorter skirt with chubby thighs? Excellent.

So, OP, it isn’t just about the fear of you gaining weight back, but also the reaction to any inevitable weight gain. I’m not sure how you convey it early in a relationship, but I wanted to help you out with another perspective.