What am I suppose to do :(?

My family and me are going down hill :( I constantly find myself wanting to runaway, and in my room listening to happy music but I still cry :( my brother that is 11 acts like a 1 year old doesn't want to do anything and when he doesn't get his way he crys and throws a big fit then I tell him to stop or something even in a public place he just yells at me and starts cussing me out like saying shut the f*ck up you stupid as* *****! And I back myself up and say I'm not a stupid as* *****! And you need to stop calling me that! It's not nice, than my dad buts in and says sam shut the f*ck up!!! I say whatever and go away or walk away of corse this makes me get into more trouble but I start walking away so I can go cry and take out my frustration my mother I don't have a problem with her but that's cause she is always working, I have a 1 year old sister she is always happy and she just doesn't get enough attention, and my mom has twin boys on the way. And I know it is only going to get worse :'( I want to just run away every time and this happens every day :( please don't say call child services or get professional help. Just is there anything that I can do to solve this.... :,( I'm in need of desperate help :,(