Ok i am a 16 year old left handed boxer and their arnt very many left handed people to spar with so i am always stuck with sparring a right hander and i can never get any of my jabs to land because my apponents jab is lined up with mine so they always just knocked down the jab please help me with this

i train myself if i didnt then i would ask my trainer but you guys and girls out there are the only ones i have to ask.
so please help me

boxerjl