Hurting - You are totally normal in your feelings.. I have not posted to anyone - as I have been the one to need the advice and support, but WOW - I can't even begin to imagine how difficult this must be for you..
I am going through trying to figure out my M as well b/c of an unadmitted affair by my H....
Anywho --- I wouldn't think about the dad funeral thing, that seems like a small part of it... Ignore that, IMO... I would maybe ask your H to go to some counseling - gosh - at least he admitted it - that is the first step...
As far as telling people - don't unless it is someone who is completely outside of your life with your H... I made the mistake of taking advice to "expose" the affair and my H feels totally betrayed by that... Stay in here, vent like hell and go to therapy on your own, if you can...
That is all I have to share and I am so sorry that you are going through this!!! Best wishes to you - stay strong and b calm!!