trust issues and insecurity

I have trust issues and I don't even know why. I had a friend and he ditched me randomly one time. That did affect me, but not like this. It's just that I never had secrets. Others tell me their secrets, but I never had any. I am not sure why though. It's not like I tell everything to everybody be though. It's just that I don't tell anything until someone asks me but I don't trust people with my stuff- like my phone, or any other materialistic stuff. I am just a very insecure person. I act like I don't care about other's opinions but I do. I care a lot about them. I won't change myself to look good. I just dress boring. Something I am comfortable in. I want to wear dresses and stuff like that but I am insecure. I skipped homecoming because we have to wear dresses. That's how insecure I am but no one knows this about me. I always wear a ponytail, single braid with my long bangs out, making me look ok homeless, or a low bun- again, with my bangs out. My hair is awkwardly long. I need a haircut but my mom wouldn't let me have one until summer. I walk with a slight slouch, but my head is held high. I am the goofy girl at school, with hidden "talents". I am still trying to figure out my identity. Am I being me? I don't know.