outsiders dilemma

I try to hard. It's so irritating, because I don't mean to I just retreat to a default setting that forces me to try so hard for everything. I don't know why, I just feel like maybe people won't like my pink hair, or the way I dress or the way I am. So to compensate I try so hard to be friends with people. Usually I focus on one person in a tutorial that I had a five second conversation with once. But then after class I will just think, are they sitting and talking to me because they want to be or because I practically force it on them. It's a vicious cycle and I don't know how to make it stop. I need confidence. I know it's the solution to all my problems. Saying it is one thing though, but how does one actually gain confidence. I wouldn't know and I don't understand it. How do you just stop being insecure about yourself and be happy with who you are. Apparently it takes time, one of those things you work on one step at a time. I don't want to wait though, this is supposed to be the best time of my life. Yet I spend about half an hour longer than necessary to get ready in the morning because I analyse my outfit so carefully I second guess what I picked and begin undermining myself so much I make myself believe my day is ruined because I don't look put together enough or fashionable enough. It's exhausting. I just wish I could live without my insecurities. Then again doesn't everyone.