Acting "as if" you are fine without him.."as if" everything will is fine and will work out. You cannot let him in on the fact that you are dying inside.
No..no personal questions; but yes.. DO look good, smell good, and act happy to be around him.
You answered your own question as to sharing your empathy with him. Yes it would be wrong. What to do if he brings up something related to the M? Answer briefly, but honestly. But don't expect that he will.
