My insecurities are problems that I have been struggling with most of my life and I know there are a lot of other people like me out there, shy, quiet, insecure people that dont know how to change themselves. And I wish I knew exactly how to help you, but to be honest you just need to figure it out yourself, just like I am right now. Find out what makes you feel better in a day to day basis, and focus on that and slowly but surely you will find a way around it.