I'm forteen and I want to grow a beard?

Do it! Grow the beard! it may be appropriate to discuss this with your family and hear what they have to say. If it gives you a sense of well being to have facial hair, gives you confidence, takes away anxiety and generally help your overall sense of who you are, then go for it! think of the down side first. How will this affect me negatively. Employer? Girlfriend? Family? Think, then do!