I'm 21 and still have&occasionally get pimples and whiteheads...how can I get rid of it for good without leaving my skin dried up or scared further?

Remember acne. Is a chronic condition that may or may not resolve as you get older. In fact some people get acne layer on in life too! It can't hurt to optimize your heath by minimizing your stress, optimizing sleep, eating healthy (remember there is no clear antiacne diet). You should minimize the number of products you use on your skin and don't wash too much. You could try an OTC salicylic acid wash.