Aren't you like 15? Just wait until you have some money and then worry about this dopey fashion bullshit. Until then, have a lot of sex, enjoy a variety of recreational hallucinogens, and get really good at something. It almost doesn't matter what that thing is, as long as you are really good at it.
Edit after looking at your blog: You look real decent dude, not sure what you're worried about, if anything I would maybe get into an exercise routine but it's not a big deal. Even though this is Styleforum, not everybody gets to be a tall wealthy ectomorph, and you look fine considering you're batting 0 for 3 (I assume).