QUOTE(sugarrcube @ Apr 30 2008, 02:39 AM)

i really eat a lot
No, you don't. Eat more.
Intake - Requirement = Caloric Excess
If your calorie gain is zero, you're maintaining, and if it's negative, you're at a deficit. All you need to do is intake more calories than you expend.
Why you want to be "kinda chubby" is beyond me, though. As a military girl, you should be training for athleticism.