I think I'm becoming a maniac?

It's not a matter of going crazy but I suggest you talk to a psychiatrist. I'm 16 right now and I was diagnosed type 1 bipolar and I had the same symptoms as you. You're not going crazy, I promise. But the depression can become dangerous and I suggest you see a psychiatrist and a therapist to monitor your symptoms better, become educated with the disorder, and get medication for it. After that process, you'll be the same person you were before and it will get better. Bipolar disorder is a mood disorder where you have mania and depression. Depression is self-explanatory with the basic sadness, not wanting to do anything, etc. but the stage I believe you are in right now is the stage of mania. Mania is having a lot of energy. Sometimes you feel like you can fly and you want to get everything done at once. It's basically the polar opposite of depression hence the term bipolar. I hope this helps and I wish you luck (: