Is it possible that i'm a manic depressive or something similar?

I'm the same way on the animal part! I have such a strong respect for animals, sometimes more than people hehe its a good thing though seems like you are very compassionate about animals. My advice sweetheart, is that you should see a professional for help. If you do have some chemical inbalance in your brain medicine can help that. Sometimes these problems are genetic. I have bipolar disorder which is just another form of depression but I started taking medication and i feel soo much better. Also, try taking a sleeping aid at night such as Benadryl. Good luck and keep your head up.