Thanks to Zeno and Harmony, I found out that the little red square means I have negative reps.
To whoever gave me this neg rep attached below, not that it matters much, but still, fck u!
Here is the post I got neg rep from:
The title didn't say it was for KR when I replied, and I have said "Edit: Oh, I didn't realize you were talking about KR. My bad."
A day later, you still bothered to give me a neg rep asking me to read the title? Do you really hate me or are you just a hater that enjoy giving neg reps?