1. Whoever told you I can be lowercased was wrong. I can never be lowercased. Ever. If I see this again, I will shoot you. Seriously. 

Though for real guys. Look at this paragraph:

"He pushed me and i fell onto the ground, where a rock cut deeply into my cheek. i'd been sent to the nurse's office and he was sent to the principal's office. i also remember how embarrassed i felt, having his parents come over with an 'i'm sorry' cake for me and having Seunghyun apologize to me. When our parents were busy talking, he pulled me out in the hallway and made me a deal."

-Popular Girls Finish First, QueenYG_

Now look at it.

"He pushed me and I fell onto the ground, where a rock cut deeply into my cheek. I'd been sent to the nurse's office and he was sent to the principal's office. I also remember how embarrassed I felt, having his parents come over with an 'I'm sorry' cake for me and having Seunghyun apologize to me. When our parents were busy talking, he pulled me out in the hallway and made me a deal."

-Popular Girls Finish First, QueenYG_

Adding capital I's makes your story look better and less like a piece of crap. Like you actually took the 0.2 seconds it takes to press the Shift button before you pressed the I button. It does make the difference people.