She was right about the fruit, it's full of sugar, so is bread and most foods. What I did was weight out every bit of food I'd eat a a meal time, do a calorie count and stick to it. For something sweet, I'd have Greek yougort with honey and dried fruit.
I know it sounds like a pain, and it is at first, but it will become a habit after a while.
Also your carb intake, should be looked at. Bread, pasta rice ect ect. The lower the carbs the better. Check out the keto diet. You can find it, but goggleing diet doctor. It's very good imo.
Good luck with it.
Atb j