I Am Afraid of Rejection

Bitter Rejection... The reason why my life is so limited.
Everything I do is controlled by the thought of being rejected. I can't be myself around many out of fear of someone rejecting me or telling me I'm weird. The only people I am somewhat comfortable with is family, my boyfriend and best friend. Everyone else I put on this sheepish mask to not do anything that would offend anyone so no one rejects me. It's actually sickening. I hate it, but I can't help it, I do it all the time. It's really messing up my life, it's like I can't do anything because of how I'm afraid of rejection. It think it's a self-esteem problem. I definitely have some self-esteem problems, self-confidence and self-worth. They all make me this weak, confused and scared girl. All the things I would love to do, I always have this holding me back. I wish someone could suck the low self-esteem right out of me. 
I always feel like it is just a phase and in a few years I won't fear rejection so much. Hopefully that is true. I can never be happy if I'm afraid to do what makes me happy. :'(