WELL YOUR RIGHT IF I LOST HER I WOULD BE VERY SAD ANDI DONT KNOW WHAT I WOULD DO WITH OUT HER..

One more thing.... they may seem like a pain but how would you feel if you lost her?

She's only worried about you.  Is she an older sister?  I have two of them and yes, they know that ultimately it is your decision and your body, but she may have gone through what you're going through (I don't know your situation so I can make all the assumptions) so she may be trying to save you the time and energy to not make some mistakes that she may have made in her past.

Like I said there are a lot of mays in my post but think about it this way.  What would you be doing for her if you were in her shoes and she in yours?

yes your sister should probably drop it but remember that she is just doing thsi because she loves you and she cares about you...as for you wiaiting till your 20 ok its good that your wiaitng  but instead of saying 20 say until you meet the man that you love because it would only make it that more special and not just sex

I agree the situation should be squashed your sister should leave you alone because you made your choice and she should respect it and be proud of you not harp on you because of it. I am proud of you and I know that you will continue to make the right choices for you. I know you can't get rid of her nor ignore her all the time but on this subject I say ignore the heck out of her. I'm sure your sister wrestled with this same decision ( if she's older ) at some point and if she is younger then she will soon grapple with this decision and I know that you will be a better sister and give her better advice then she has been to you on this ubject. Know that you are a great person and know that your sister is only doing this because she loves you but sometimes that love can be expressed in ways that can drive us bonkers sometimes and in the case of my older brother CRAZY.

                                                               Best of Luck Carrie