i need to lose weight and get muscular

every year it the same thing i wanna lose weight but am never able to until 2003. i was really sick and lost maybe 15-20 lbs. i felt real good and i was able to get my weight down as much as 208lbs. but the stress of school got to me and i stopped exercising a lot. i use to play bball at least four times a week for two-three hours. i just need the movitation. enough to make it through.