My Wall. glass?

On Friday I got asked if I was okay because I looked like I just got terrible news,
that was when I thought I had my strong face on. truth is my world was crashing down.

Today I got asked by someone who didn't really know me, if I was a vegetarian.
the answer is yes.

I thought I was guarded, I thought I was hard to read, but now I feel transparent.

Why is it that the people I need to see me most, probably never will?