I would consider her a good friend, we have been friends since a really young age, went to the same school etc.
For the last few birthdays I've had she has always had an excuse for them - she booked flights for that night so couldn't come, last year she had to attend a family wedding and this year she is working.
I know I am being unreasonable as the world does not revolve around my birthday. But it would be nice for one year for my friend to actually spend it with me, as I also make the effort to come to her birthday.
I think it's just because it's been so many times which is why I'm a little upset over, but I am prepared to be told IABU.