- Changed "Hi" to "Hello" and added a comma. It makes the character more approachable.
- Comfy may be a word, but is informal, and a bad one at that. Comfortable is more acceptable.
- There is no special word for sheep as a plural - it is just sheep. "A flock of sheep".
- "but other than that it was too silent." does not make sense. Removing "too" helps, or changing silent to quiet.
- I's were great till "Until i heard". Fixed.
- The opening dialogue could be simplified into two sentences.
- "One thing I forgot to tell you, I was sleeping in my attic, and the roof is so low that I can barely stand up that my head would hit the ceiling." What purpose does this sentence serve? I won't remove it, but if it is unimportant, I wouldn't have it. You could just say something like "I stood up, almost forgetting how low the roof was in the attic, nearly hitting my head in the process." You should also describe earlier that you're in the attic - the character does not "forget" they are in the attic. The reason why is because the character does not have someone specific to talk to. If they were talking to someone, perhaps it would be different, but not in this case.
- "My grand grand father". Should be "My great grandfather". Changed.
- "I went down the trapdoor and held the lid of the trapdoor while I was holding on to my ladder to go down." You shouldn't use the same word in one sentence, with exceptions to words such as the, it, is, etc. I changed it somewhat.
- Everytime is actually not a word. Every time is a word. Well, actually, two words..
- "into my cellar".
A cellar is underground. Would have had to be a REALLY strong object. If you mean something else, I would definitely do some more research. A greenhouse for example, would be above ground, but is just for vegetation growth.
- "hearing it crash like some kind of meteor." Use a more realistic sound example. Not everyone has heard a meteor crash, but everyone has heard something like thunder. Changed.
- It seems like English is not your main language. That's okay though. Every now and then, the tenses of your words change. The opening is in present tense, and the second paragraph is in past. It's not a big problem, but it does become a bit of a jumble.