<human>: Can you condense the text into three sentences or less?

So about three years ago I weighed 450 pounds.  I was at the heaviest I had ever been in my life.  I was unhappy, but got through it by abusing a lot of substances.  This is a picture from around that time. 

Something clicked though and even though I kept abusing substances I lost about 150 pounds over the course of a year.  There wasn't any science to this amount of weight-loss, I just stopped eating as much...and munching out.  It felt amazing I finally took hold of something in my life and I was starting to reach a place I had always wanted to be.  This is me in that time frame. 

What happened next was the hardest thing for me I hit a plateau that I couldn't break.  For the next two years I fluctuated from about 310-300 pounds.  I tried tons of diets.  I was a vegetarian for almost a year and a vegan for a few months.  Nothing worked.  I even saw a psychologist who specialized in obesity and taught me many exercises to use in daily life to help me lose the weight.  Nothing worked though.  Then I found Reddit.  I started browsing the subreddits and two that I became in love with were Lose-It and GetMotivated.  I've lurked here forever, or so it feels.  I made an account just to subscribe to these subreddits.  With all of the posts I saw from these subreddits I became extremely motivated and decided to jump back on the wagon and try to lose the weight again.  Through the use of strict calorie diet I finally did what I thought was impossible.  I broke my plateau.  I now weigh 275 pounds and can fit an extra-large t-shirt for the first time since middle school.  I also have quit everything, but drinking now and again.  All I can say is thank you to all the people who take the time to share their stories and motivational pieces on LoseIt and Getmotivated. Thank you.  Also a shout out to my younger brother who was an inspiration. Here is my latest picture with the before from about December.
<bot>: Weighed 450 pounds three years ago, lost 150 on my own and then I hit a plateau for two years.  LoseIt and Getmotivated helped me break my plateau