be more bold... decide that you are going to be happy with the way you are... if you ask a boy/girl out and he/she says no that is ok because there are more people to love... if people make fun of...
Who aren`t you shy of ? Try thinking of that person when you are around who ever you are shy of. I have never done this before because I am not really shy but you can try this and see if it works! :)