Don’t touch me and no I don’t smoke crack

Growing up with an old school Asian mom you’re taught to stay a virgin until forever basically. Well at sixteen I lost my virginity to my best friend (now boyfriend) and she still has no clue. I’m 18 now and she keeps asking if I ever do “bad things” aka sex. I never plan on telling her because 1.) it’s not her business and 2.) I know she’ll just disown me some more. Well she knows I’m on birth control and she’s mad about that because I never asked her permission and she can’t stop me from taking it. Occasionally she brush her hand on the outside of my vagina and say “are you still a virgin”. I told her to stop touching me and she still continues to do it. (She also slaps my butt too). I’m just at a lost at what to do because she won’t stop and I won’t tell her I had sex. Honestly I think she knows already and just wants to me say it but I don’t think that calls for her touching me. Also she is convinced i smoke crack which I don’t. Yes I smoked weed and my dad found it but I don’t think she should accuse me of smoking crack. I don’t smoke anymore however ushe still has it in her mind that crack is my drug of choice. 2019 is a sober year for me and I don’t plan on smoking or getting drunk. Basically how do I deal with this. I know smoking and drinking is bad but I’ve moved past it and now I’m focusing on college but the whole virginity thing is stupid.