Why oh why?

Just came back from Korean BBQ since my father is sick. Talking about my sister's future on the way home and just realized that I'm going to leave on my own after few months more. She's leaving Malaysia in 6 months more and we should start to cherish our every moment. But we are still quarreling every single day like bitches. And it's always because of a shirt or just some tiny stuffs. When will it end? =/