Complicated (why is life so.............?)

*sigh*
Why is life so complicated?
Why is it I constantly feel the need to protect other people when really I should be just getting on with things and expressing myself?
At what point am I allowed to just be me again and not have to worry about what other people might think about things? I know where I am at and really don't see why I should need to justify myself to other people and yet I feel as though I have to tailor things and be guarded about what I say.
*sigh*