You're still young so I'm going to tell you something that you really need to hear. Do not be ashamed of your stutter. If you do that, it will only become worse and you'll soon resort to escapism whenever life throws something your way. Don't think that other people are getting impatient with your stutter. Even if they are, its none of your concern. You have to right to say what you want and take how much ever time you need. The more you talk, the easier it will become. Don't worry about it. A stutter is something that comes and goes. If you look at it like its a problem, only then will it become a problem.