1. learn to spell properly
2. It's just what sisters do fight- i used to have verbal fights and sometimes physical with my sister too when she was doing her a-levels and stayed on the computer until about 1 every night and i couldn't sleep, i also have a friend who has a sister in the year below us and they fight all the time over stupid things
3. you'll both grow up eventually or the other one will and you'll get on, take my sister for example whenever she comes back home i love going shopping with her or telling my problems to her but a couple of years back i couldn't stand her!