Somebody's fault?

How should I start writing it? Staring at the computer for sometime, I decided to just write anything that come across my mine. People who get angry easily are often bad-tempered and impatient. They get angry when you misunderstood what they said. Sometimes, it's not your fault but the way they express is wrong. However,they just doesn't realise it and gets angry when they have to repeat the question one more time. Is it that hard to repeat the question ONE more time ? My roommate is this type of person. While getting out of bus this morning, she asked me a question and I answered it wrongly because I was walking in front and there were other vehicles on the road, so I couldn't get what she means properly and she started accusing me that it was my fault for not paying enough attention to her. I was a bit frustrated by it. She is kinda judgemental. It's always other PEOPLE'S and NOT hers after all!! Another incident is the leaking of tape outside the landlord's house. I forgot to phone the landlord about it because I was not around during the weekend and she just blame me for it. I already said that I FORGOTTEN doesn't mean that I DON'T want. Can't people have this forgotten behavior sometimes?! All humans have such characterics. Uh! Am I making the right decision to stay with her? I hate to ask this question. This is because when such question arises it will affect my attitude towards her. Oh, seems hard to explain. As the chinese proverb says: Seeing is easy, staying together is hard. Maybe it is....