I may be BU here. But I'm hoping someone can at least tell me this feeling will pass/that they have been through something similar.
My dad died suddenly in April and I'm finding it tough - I had counselling arranged with cruse but cancelled it last minute because I don't feel upto it yet.
My dad and mum have been separated for about 10 years and (this may sound bad) it was always me and my dad were closer, and my mum and my sister were closer if that makes sense.
After a weekend spent with my mum and sister I just felt really fed up and angry with them, they seem to be coping fine and it's me who's stuck behind feeling shitty because I miss my dad so much.
I can't talk to them about it much as they just don't talk about it 
I think my point is that I'm pissed off that it's me 'left' with them and I won't see my dad again, I'm feeling very resentful of the fact that they are different to how he was and just seem to be Coping so well.
I need to get it together and appreciate tempe fact it still have my family, but it's easier to feel angry at the moment unfortunately.
(I'm typing this ony phone, twice the auto correct has changed a word to my dads first name
:))