) I have really oily skin and a lot of acne. I’ve tried proactive and even tried changing my diet, but nothing works. Will I ever outgrow it?

Many different things can cause acne, such as hormonal changes, poor diet, genetics, stress, and overuse of skin care products or cosmetics.  If your current regimen is not helping to improve your acne problem, perhaps it’s time to consult a dermatologist to find out what is the best treatment method for you. The good news is, many teens do outgrow acne when they reach adulthood.  
 
For more information about preventing acne:

Acne

 
Reference:
http://www.webmd.com/skin-problems-and-treatments/acne/features/oily-skin