I forgot her birthday

It was yesterday...I can still wish her a belated birthday but should I? I mean, we don't really talk to each other anymore. It's mostly my fault since I'm horrible at keeping in touch. I've lost many friends that way and continue to do so. Why do I have to be so stubborn over insignificant crap like this? I don't know, I'm just dumb.
Hehe...I decided I'm going to text her.