I understand where you are coming from and had the same issue. When I brought it up to my parents I told them I wanted on it to help clear up my skin. They were iffey at first because I rarely have acne but they thought it was a good idea! I hated lieing to them, but better to do that then come home and tell them there 16yr old is pregnant.
The other thing to remember is that the Pill is great for preventing pregnancy but does nothing to prevent sexually transmitted disease. The smartest girls use condoms along with their pill or IUD, for that reason.
Hi there. Well, I'm not sure how you tell them you want to be on birth control without them knowing you have sex. :>) That is tricky. Now, I generally recommend girls talk to a parent but there is also the option of Planned Parenthood. They will work with young ladies of your age and do an exam and provide birth control pills if it is right for you and often without parental involvement. do you have Planned Parenthood in your area?
I know parents don't want their babies (and you are always their baby) having sex. But your step mom (and dad) will be happy you are being responsible. Teen pregnancy is an epidemic and really can mess up someone's future if they had other plans like college and career. So, they will probably help you in order to protect your future.
I do just want to mention that having respect for your body and not giving it away easily is so important. :>) Glad you use condoms. Glad you are a responsible girl. VERY smart of you hon. good luck