Help me with my temper :(?

i need help. my life is being ruined! I always feel like my family doesnt care what i say, or they are alwaya ganging up on me. if i express my feelings i feel like they just shut me down. this has pretty much ruined my relationship with my mom. she gets on my nerves so much and is always nagging me, she is hypocritic and always gets mad at me for using "a bad tone" with her. she is always the one using the tone with me tho! It ussually ends in her saying how mean i am and me saying how she can be so stupid sometimes. i run to my room crying. i am always the one that has to apologize because i feel so guilty but its really getting on my nerves. she always starts it or my sisters or brothers or step dad, and yet i am always the one who has to apologize because i am so "dramatic" ( as they say) Im tired of fighting and ruining my relationships and i try to be nice but they always start it. i am so depressed and i have alot of tough things going on in my life right now. im tired of being sad everyday and mad :( i have written them many letters expressing how i feel and whats going on and gow i feel they gang up on me, and then were okay for a little bit but then it all h appens again. i am a teenager and i kow they say its just hormones and what not, but i truly feel like i am trapped in a corner and being "pushed " from all sides.