Changes in Mood and Behavior on Quetiapine

Hello. I've been taking quetiapine for about a year as of this month. I've notice some changes in my mood and behavior over all. some good some eeh its okay. I do however feel sad about the way that I am. I'm not as excited and upbeat like I use to be. Whenever I get around my friends I'm super quiet around and I'm always second guessing who I am around them and just in general. I don't know if it the meds or and I going through changes. Sometimes I miss the way I use to be even tho I was manic most of those times.