Any advice on this personal statement?

Personal Statement for my Virginia Tech Application:

prompt: If there is something you think would be beneficial for the Admissions Committee to know as we review your academic history, please take this opportunity to explain. (<250 words)

Statement:

 This year has been the best year of my life.  I have come a long way to get to this point, and all of my hard work has paid off.  In September 2012, I began my high school years as an unconfident, overweight, socially awkward student with an addiction to online video games.  The lack of confidence and self-control that stemmed from my unhealthy habits hindered my performance academically and socially.

Throughout my life, people have always told me that I’m intelligent, and I always felt as though they were right.  Once I got to high school, however, this feeling of intelligence slowly deteriorated.  During my first two years, I attended slightly difficult classes, and only did enough in those classes to maintain a decent average.  I didn’t study and rushed through assignments, just to play a meaningless video game and eat junk food. 

In my junior year, something inside of me clicked.  I had to change my lifestyle.  I quit playing games, lost over fifty pounds, and focused on schoolwork.  This new lifestyle gave me the confidence I needed to push myself to the limit.  My senior year has been my best and most challenging year so far, and I’m taking seven AP classes. Before my metamorphosis, I would have thought this to be impossible. Now, I’m the most successful I’ve ever been, and I’m only looking to push myself even further in college.

Note: Any advice on the actual content? Should I use less contractions? Am I answering the question effectively? Should I even use this prompt?

Thanks in advance!

Just some quick advice, nothing too in depth, I recommend varying your syntax up a bit! You use a lot of shorter sentences and it may come off as a little choppy! Good luck!!!

I didn’t even notice, you’re definitely right. Thanks!