Sorry thumbwitch, forgot to mention the merry widow website (for all ages, both sexes, who have lost partners) and widowhood on msn. It is really comoforting to look at these sites, even if you don't post.
People support each other and write about all sorts of things - sooner or later you find a problem you think just affected you dealt with there. Also, Katie Boydell, who founded the merry widow site, has written a book called Death and How to Survive it, which people have said is really helpful to read.
People also meet up around the country from merry widow and widowhood - and that can help, meeting people in the same boat.
I haven't gone to a meet up or read the book, but I do regularly look at the site, it helps you not feel so alone. Does your dad have access to a computer?