Naruto Mary Sues: A Fate Worse Than Tsukuyomi

Sand and Sues (A Gaara Love Disaster)

I crossed the Kazekage building again, there he was, the Kazekage I meant, he was staring at the sky again. Was he doing that every night? Even though I was this far away, I could sense that he couldn't sleep. I could feel it in his blood.

You could feel it in his blood, huh... That's not creepy at all... Also, you keep saying things like "cross the Kazekage building again" and "he was staring at the sky again". This tells your readers that Rin has seen Gaara do this multiple times before. It doesn't make sense for her to ask "Was he doing that every night?". She should know the answer to her own question. Also, her name is taken. There's already been a Rin. I know she's dead, but the image of canon Rin pops up every time.
Future Kane: She actually did that on purpose. Apparently this Rin looks exactly like Kakashi's Rin. How do I know? He told her. Great. Somehow Kakashi found a way to adore this Sue like everyone else.

I did try to sneak into his mind to know what he was feeling but i found it useless. . .or he wasn't thinking of anything in particular. I decided to shrug it off because it was private property anyways.

Capitalize the "i" please.

I noticed that the sand was forming around me, wrapping me until I couldn't feel my hands anymore. Even with that, I'm a ninja who doesn't need to use hand signs anymore, I just needed my mind. Even without thinking, I knew whose sand was this. The sand lifted me up until I was in front of the Kazekage at the rooftop.

If my hands were being wrapped so tightly that I could no longer feel them, I'd be in a bit of pain before I got to the no sensation part. The grammar is on the poor side. There should be a period instead of a comma after the word "anymore" and "was this" should be "this was". The vocabulary is a bit repetitive too. I'd use "anymore" and "even" only once in this paragraph. You can completely omit the second "even" to make things flow more smoothly.

"What do you want?" he asked with an emotionless tone in his voice while staring at me straight in the eye.

"I wish no harm," I told him flatly, as emotionless as him. "I was just passing by,"

"Why are you not afraid?" he asked me. "Why are you not afraid of me crushing you? You're a trespasser,"

"Go on," I told him. I ignored the last part. "You could kill me," he didn't answer so I continued, "You couldn't sleep again huh?"

SUSPICIOUS AS FUCK.

"Again?" he asked but still, with no emotion in his voice. Instead of asking me what was going on inside his mind, he explained his reason, "I don't sleep. Nightmares."