((CfinKC))
So sorry about your Dad, losing a beloved parent is SO hard to deal with.
But please cut your friend some slack. Her family is the most important thing in her life as long as her kids are small, and that is as it should be. You don't know for sure if their finances could cope with an expensive airline ticket, or what family plans for Easter they had already set up; Easter with kids is usually a Big Deal. Your Dad's death is huge for you, but while she probably felt bad for you, as a mother of 2 she has higher things on her priority list right now than going to a distant funeral.
Life treats the best of friends in different ways as the years go by, and we are not always on the same wavelengths as we were when we were both schoolgirls. And I have noticed that those who have not yet lost a loved one do not know how devastating that can be, so they can't be expected to "get it".
The best thing you can do for yourself right now is to realize that you are grieving, and it is perfectly natural to lash out because you feel SO bad. Take care of yourself, give yourself permission to wallow in sorrow for as long as you need to, and it can take a long time. But if you ever valued the friendship, don't do anything to sever it now. Maybe after a few months you might feel better about contacting her again, and telling her how much you wished that she could have been with you at that difficult time.
I'm glad that you wrote about this here, this is a good group of people and I'm sure that you will find help and true sympathy from us all.
Hugs and best wishes from someone who has been where you are now.