Has anyone else gone through this pain?

Im struggling so much the past year or so with all this new stuff im learning. Ive always been a bit over protected and sheltered, but always a very happy person and played with my best friend when we were kids. so i had company. but i had many umptions about the world growing up, and ive always felt different from everyone. the way i think, feel, act, but ive always been well liked. but what really bothers me is lately everything that i viewed as being this way or that way, and thought it was for certain...is not at all what i thought. i know when your a kid, everything seems magical and perfect, but for me, i have had this to the extreme right up until i turned 21 which was a year and a half ago. i still believed in santa (seriously!) until i was about 16 or 17. i actually thought he was phycailly real at that age. ive always been a day dreamer and loved fantasy and growing up i felt the world was magical, that everything was nice and safe and that everyone was out to do good for everyone else and i felt totally secure. this past year ive learned that there is no magic. that everything in life can be logically explained. that people do lie, and cheat. that the world isnt out for my best interest..but their own. for money and status. most of the things i thought were totally innocent and wonderful turned out not to be as innocent as i thought. and life in general now is scary and im seeing it all the way it really is. i HATE it. i hate this. i want my old state of mind and views back. i want my perspective on thigns to be the way they were when i was a kid and growing up. things felt safe, i didnt feel scared, i was happy without worrys, and everytihng seemed so simple! but its all complex...or so man has made it that way it seems. when i get myself back in that childlike state of mind, im happy! its the way i want to feel. otherwise im down and want to cry. i just wish i hadnt crawled out of that box and came to realizations. anyone else gone through this? it hurts me bad like you cant imagine. my once peaceful and simple joyous life has gotten confusing, scary, and not so innocent. i hate this. i wanna be younger again sooooo bad. i hate reality right now. im tired of all my childhood perceptions and old ways of thinking being crushed everyday by new facts and scary things. i used to beleive that when things seemed too good to be true that it wasnt. that it was really the way it seemed. it made me happy. now i know...if its too good to be true, it probably is. that taints my old childhood ways of thinkings more as this happens. ...someone...anyone...understand me please..and help. no rude comments please.