Thoughts and thinking

I think about everything down to the smallest part. I find myself complicating the simplest things which just make it harder for me, i just cant keep calm my mind is all over the place and if something is out of place it drives me nuts. Im wondering if im the only person out there thinking about everything or thinking the way i do. Why are we here what is the purpose of human life. We werent put here to destroy earth and if we were, then why?simple questions like that i constantly ask my self. If someone thinks like me or even close please respond and please dont make fun ive been taking it all my life. If anyone has advice on how to control my mind so i dont go crazy please respond.