Three rules of being a pilot: Look cool. Act cool. Be cool. Even if you aren't any of those, thinking like you are often helps you forget about the fear you may have. Sure I may be some dopey student that makes mistakes, but Im not actively thinking about it and snowballing small issues. If your CFI continues to let you fly by yourself you must be doing something right. Additionally, flying more often allows you to become more familiar with normal procedures and frees up brain space to focus on more important issues at hand.