My Mother Thinks Im A Nerd?!?

So, my mam thinkis im a nerd because i dont realy go out much and when i do its usally only to skatepark or the normal park and i want to start warhammer but my mam says"no i havent brought up you to be a nerd" (im still doing it) and also she thinks i am because im quite good on computers ino she she loves me and wants best but seriously?! i need some help on how i can explain on how im not a nerd and yes (i do tell her ALLL the time tha im not a nerd) SHES SO ANNOYING I WANT TO MOVE OUT BUT IM ONLY 14