Bud, you're in the best time period of your life right now!! You're body is naturally producing more testosterone than you need. If I were in your shoes and I was faced with the decision of whether or not to do a cycle, I would choose not to. You're too young, man. Right now, all you have to do is tweek your diet. If you can't add mass because your body burns fat too quickly, just EAT A LOT! you will gain size. Period.
Now, if I was in your shoes and someone told me not to do steroids, the first thing my brain would be thinking is "f*** these guys, I'll do whatever I want". I get it. trust me. However, the reason we tell you not to is because steroids are no joke. If you do a cycle and mess one thing up, you could permanently damage yourself for the rest of your life. For example.... When I was younger I did a cycle. Keep in mind I had a very nice, thick head of hair. Now, my hairline is thinning like crazy and eventually I will have to be bald like Monstro. If I only listened to others when they said not to, I could have been JACKED out of my mind without steroids and still had a full head of hair!
So, to make this long story short. Stay away from them. Eat a lot of calories and keep working out. You will get bigger, man. But, if the rebelious side of you decides you're going to do this anyway, you're BEST bet is to create a thread here and post EXACTLY what you're planning on doing BEFORE you do it so the experienced members of this site can make sure you're going to do it the right way.