To: I hate my job, it is exhausting and killing me. Why can’t I cry
Me: Why don’t you leave and go and work doing something else which you enjoy.
You can’t cry, because the reasons for crying are not for those reasons that you describe – emotions if you lose someone dear, or a relationship breaks up, leaving you lost and forgotten are what makes you cry or possibly from happiness.
What you describe would mean to me, it is time to leave your job and try something else, instead, which is not so demanding on you.