English isn't my native language, so, you know.

This all happened when I was in highschool. Long story short, new kid shows up at the beggining of the year, dude spends the year just constantly emotionally bullying me. He had more money than me, so he had the habit of making fun of me because I was "poor", constantly taunting me about it.
So one day I had enough: I was sharpening a pencil, and accidentally dropped the sharpener into the trash bin, dude sees this, immediately goes "Hey WeakPangolin, are you searching for something to eat, since, you know, you are too poor to buy lunch?", I turned around, looked him in the eye and just said "Yeah, well, at least my mom doesn't have cancer". 
Ended up getting a 1-day suspension, both the schools director and my parents gave me a sermon on how what I did was horrible. He got away with it, but at least he never bullied me ever again.

So, was I the asshole?