If anyone whos out there, who truly cares- could you help me?

You sound like you eat really great. Better then me lol. And as far as being too mature, there is nothing wrong with being concerned about your health especially considering your family history with cancer. Part of being a teen doesn't always mean eating whatever you want and not paying the price. And if you feel you're unhealthy then perhaps you should try working out. Just a bit daily, a few sit ups, maybe a run. I'm sorry to hear about your family situation, but just remember that no one is ever truly alone.