its hard for me to find happines in life

It's my sisters fault when i have done some thing home they come and critisise it and so i get upset and try to defend me and so my father starts to yell at me so i go to my room and sit there rest of the day then when i go to school i'm sad there so my teachers phone home and i get more shit. i don't know how it all started but it hasent always been like this