I don't think you're really overweight. Maybe relative to something you're used to if yo'ure going by numbers on the scale. Maybe you feel a little squishy if you have a higher bodyfat level tho.
I don't think the point is so much "eat a bodybuilding diet" - a "bodybuilding diet" can be a cutter or a bulker depending on your goals. I think a "bodybuilder diet " is one that is clean and doesnt' have processed shit in it, and is coupled w/ a solid training program
At those stats you should toss your scale out the window and not worry about diet, but rather look to change your body composition. Understand that increasing muscle mass will make your fat look better, but also muscle weighs more than fat, so if you are going to judge "progress" only by the scale, you're probably just going to end up scrawny.
Can you give more detail about what you do for physical activity and also a typical day's meal plan - e.g.
Meal 1: 8 am
2 whole eggs + 3 egg whites
1/2 c oatmeal
Meal 2: 11 am
6 oz chicken
1 c salad
etc.
Even better if you can put that all into a food counts program like
FitDay - Free Weight Loss and Diet Journal (easy, free, online, just enter your food you eat & the portions) and then post up the total calories and macro nutrient ratio (%, grams of protein ,fat, carbs.)
The point of all of this is that the diet that succeeds is the one that is really just the typical way you eat, tweaked a little to optimize it to get to the goals you want.
Your question is way to vague to respond w/ anything worthwhile, so please provide more details as above, to help us get u to your goal.