Hi, I am 17 and I feel like that sometimes. I even hated myself for being "different", I mean, less talkative than most of my friends. I know how it is hard to gain confidence in yourself, I also have no self steem. I thought a lot that I had to change and it scared me, I had fear of trying and end up feeling judge. So, I always felt like I wasn't able to change and it made me feel a prisioner of myself. Now, I am recovering, step by step, slowing, with some depressive moments, but I am better. I can't tell you what's better for you, however, it worked for me thinking that I was spending so much time alone and isolating myself and that I had no reason for being so shy and insecure. Remember that your friends really like you and that you don't need to be scared when talking to them. Furthermore, meeting new people may seem hard but convince yourself that you have nothing to loose, however, you may turn into good friends and have a lot of fun together. Everyone is different and you don't have to be affraid or embarrassed of showing yourself.
You can message me if you feel alone or want to talk.