I wrestled in highschool, and have always been a smaller guy.
It sounds crazy, but in January of 2011 I was sitting on the couch watching T.V., decided that I would get bigger, went to Walmart and bought a bottle of Protein, and never looked back. I haven't missed a workout in a year and a half, gained 30 pounds of muscle, and get mass amounts of attention because of my muscles.

You not only feel great, you look great.