being a stronger, more motivated cancer?

i feel like i have the worst qualities of being a cancer. i'm very unmotivated and scared to make a move to better my life and i'm very emotionally sensitive, even though i can hide it. rejection really devastates me, and when i go out to be social, i feel really self-conscious and think im not good enough to be there or i'm not attractive enough to catch the attention of those i'm actually interested in. on the flip side, i also feel like im better than everyone else, or at least people aren't good enough for me.

what can i do to basically get over myself and change my life? i know i'm capable of a lot, that i'm physically attractive, and that people do like me. i can't get out of my head and its made me insecure and therefore shy/timid and scared. i also know that not everyone is going to like me, but it hurts way too much to be turned down.