I've been maintaining the habit of taking a nap at noon for a long time, but today I didn't even take one because I had to deal with some chores. I've been maintaining the habit of taking a nap at noon for a long time, but today I didn't take one because I had to deal with some chores.

even.....feels unnecessary

I'm now sitting in the library, with the curtains fluttering beside me, i. It's such a beautiful scene! I'm now sitting in the library, with the curtains fluttering beside me. It's such a beautiful scene!

Optional but I’d include a full stop here :)

I'm now sitting in the library, with the curtains fluttering beside me, i. It's such a beautiful scene! I'm now sitting in the library with the curtains fluttering beside me. It's such a beautiful scene!

I've decided tohat I will live on a pasture for some time during the vacation. I've decided that I will live on a pasture for some time during the vacation.

Given that the next sentence after this one is implying it’s happening in the future, and you are currently not at the pasture yet, I’d just slightly adjust this sentence.