Lose more weight. There are a lot of middle-aged chubby-chasers out there, but not a lot of young ones.
As men age, they either lower their standards, or find out that sex with fatties is awesome, and become plumpa humpas. Good job on losing some of your weight, but you'll have to keep it up if you want to attract boys your own age. You might find it easier to give one of those old dudes a try and let him surprise you.