Which sentence from the story best supports the reason why Anne is writing in a diary?

From the text:

"Paper has more patience than people." I thought of this saying on one of those days when I was feeling a little depressed and was sitting at home with my chin in my hands, bored and listless, wondering whether to stay in or go out. I finally stayed where I was, brooding. Yes, paper does have more patience, and since I'm not planning to let anyone else read this stiff-backed notebook grandly referred to as a "diary," unless I should ever find a real friend, it probably won't make a bit of difference.

Now I'm back to the point that prompted me to keep a diary in the first place: I don't have a friend.

I would use either the first or last sentence as evidence for why Anne is writing in her diary.