No one else can see that spot. Eat some more, but don't let anyone tell you what you should be eating or how you should look, ever.
Keep going to bed early, you're doing good. Don't take anyone's word as gospel, not even her's. You're pretty good at it already, but keep trusting your gut – it knows more than you do.
Coffee does start to taste nice, really nice, but don't drink it until you want to. You've also got a ridiculous metabolism so don't worry about what you're eating, but maybe add a few more vegetables.
No, you don't know what a hangover is yet. You really don't.
Everything will come in time. Easy for me to say, but you won't regret not rushing anything, and everyone else can do their own thing.
You're good at the whole not caring what other people are doing thing. Keep it up. Practice it whenever you can.
If something makes you happy, even for a short while, then it's worth it. Things don't have to last forever to be good.
When mum says that things happen for a reason, she's right. You might have to wait a bit to see how that works out, but it does.
Keep it up.