It seems to me, that people have a hard time living up to dreams, especially when nobody wants to believe that you can attain anything you want by standing by you heart. Just do the math and then you can make your own,

Start your battery, ignite your drive's intensity. Live with direction, enjoy vitality. There's always someone waiting just to bring you down, so get it all together, pull yourself up off the ground.

And so it seems, that you keep letting people tell you what to be, instead of living your life. Put your fears aside and pinpoint where your problem lies. Don't hesitate, just get it straight. You can do it if you just let go.