Don't worry
I really don't think that you are a bad friend. I mean you went through all the trouble to get me something so special for my birthday. How many people even think of doing that. It is the little thing that counts. I understand how you feel, since I am pretty the same. I forget to call people and that is really the best thing. But even if you haven't remembered a friend in a time of excitement, even if you do just remember them once in six months, its still ok. Since remembering them is the main part. And people don't accept you for who you are, they really not worth it.
Ok I am getting to philosophical now :P
What I am trying to say is, it is in times like these that you realise who your real friends are. People who put with only the good and leave during the bad are not true friends. Friends celebrate your good and support you during your bad! ^_^

Nishtha ^_^