Don't be afraid to make mistakes. Go ahead, make a complete ass of yourself more and don't worry about how it looks to others. How else are you going to learn the ways of the world?

 No one is thinking that, chill out.

 Don't leave her. You may take her for granted now and get bored. But you will find out she was the only one that treated you that good a while after. And by then, she will be gone.

 Don't ever try oxy, you'll lose the one you love and you'll be alone. Now, the only thing getting you through life is the one thing you hate the most.

 I loved him..and i still do.

 Don't fall for him. or him... or him. Just don't do it, you'll barely live through it. The tears you'll cry for years to come aren't worth the measure of their sum.

 Don't answer the door when you see Gandalf and a bunch of Dwarves on the other side.

 Go to your fucking classes. Idiot.