As hard as we wish, there is no pill, etc. that will take care of your problem on the backside, permanently. Realistically speaking, your best bet for what you desire, is to create a savings plan that will pay for laser (which may or may not help)and/or find an electrologist with good speed and a high kill rate. Both require money, so if you plan forward and save up a nice little wad, you can do a lot at once and stay even with the hair growth cycles that are so important to success. When you have the money up front, your treatments aren’t spread far apart because of money issues. While you are saving for a consistent hair removal plan, you can do your homework on laser and electrolysis options in your area. Get your free consultations and test spots, after you read hairfacts and hairtell for guidance, of course, and try to get word of mouth referrals. When you’re ready to dive in, you will know who to call.
The other option is to find a hairy friend who desires what you desire, purchase an epilator and a good electrolysis book, and learn how to do electrolysis on each other.
Being that you’re only 19, most likely you will be developing new hair for the next 20 years. If you are dead serious and see yourself with a hairless back for the future, start your hair removal plan now.
By the way, shaving does not affect hair growth. Shaving didn’t make your hair thicker and darker. It’s actually a great and cheap temporary method until you can afford a more permanent option.