Part of me has died. He is gone and won't be back. I've been with him for nearly half of my life and we have always been together.  Now we are not.  What am I supposed to do?

I am able to drag myself to work and home again.  I am not doing a great job like I used to do, but I show up [barely] do the job and drag myself home again.  He's only been gone just over 2 months.  How do I learn to live and exist when everything stopped when he died. Is there something to do or…