Why?!!

Why am I treated like this? Why do I see my father treating my cousins and nephews way more better and friendly than me...

I see no difference, between me and a garbage can, I get used and all my feelings are thrown away..

That's why I am calling for help, I admit it, I can't go on this way...

"Life is tougher than i thought, it's tough and rough enough to make you ask for help"

 I am 15 and the last time I chilled out with my friends and had fun, laughed, smiled and talked frankly was 4 months ago, even these days in the feast holiday, they push me to study, study, study, I know that I am a high school student and my duty is to study, and work hard, but they were killing the child inside me years ago, to get good grades, to get useless certificates...

"They used to use all kinds of torture, maybe electricity wires are left, and I resisted, though I seemed to be foolish, because every time I fall down, I put all the hope in my body, I gather it up and use all my energy, then I rise, but I get struck again and again and I fell down"

This is my situation currently, please help