Boyfriend is acting anxious and short tempered. I understand why. He currently had 2 deaths in his family. A sister and x wife. He is not fun to be with. I am not sure how to handle my time with him. He is uncomfortable to be with?

Sweety, in REAL life (unlike on TV) people dont laugh through the tears.  Grieving depressed people are not going to be fun because they dont feel fun.  I dont know about the ex, but he lost his sister for goodness sake.  At some point in our lives we need to grow up and stop making everything about us and whether we are having fun.  REAL ife often isnt fun.  Theres grief and illness and pain and anxiety and disagreement.  Its never always anout having fun.  Often its about having a mature sense of empathy and being supportive.  Sit with the man quietly, watch movies or whatever, listen if he wants to talk.  It could be a reallyong time until he feels like doing anything 'fun'.  Different people grieve differently    When my cousin and best friend died suddenly at age 33 it took me literally months before i felt like doing anything but go to work and come home and get in bed.  Depression is a horrible, debilitating thing and grief based depression is somehow worse.  So OMG!  Who cares if you arent having fun right now.  Really...If I, Me, My having fun is all that is important to you then maybe the poor guy would be better off without you. 

So what you do is stop nagging and demanding dayes out.  Order dinner in or make him dinner, sit quietly and watch movies or talk or just do whatever you kids do separately on your phones when you are together.   Have sex if he feels up to ut.  But Its going to be awhile before he feels like going out clubbing or anything that requires social interactions most likely