Why cant no one understand me?

OK im 13 I love to study history today me my uncle and aunt with my three cousins went to a lake my aunt asked me what do I like to do then I tell her that I like to research about history then she says ''no what do you like to do for fun'' and im like -_- so I tell her with a smile ''I...I don't know'' Ive never liked sport.I like to research history and guns especially rifles my mom and grandma cant understand me. only my dad that is in the army and divorced from my mom my grandma's dad was in ww1 my grandpa's dad was in ww2 my grandpa was in Vietnam and my dad was in Iraq and in Afghanistan and I will proudly will continue the generation...my family wants me to get into a sport but I keep telling them I don't like sports I like to go to firing ranges Ive shoot a 223 caliber bolt action rifle with my uncle but my uncle thinks that the world doesn't need guns I agree with him but that doesn't mean I cant study rifles nor history I personally fell unsupported by my family Ive had multiple thoughts of suicide...its like what I like automatically become something they hate...please help me.