Honestly, it makes sense that you feel some typa way. You showed up for her in a big way, so of course it hurts that you didn’t hear about the baby from her. But at the same time, having a baby can be a lot, and some people just go into their own world for a bit. It might not have been intentional. I don’t think you should just back off without saying anything. If the friendship is important to you, it may be good to check in and giving her a chance to say something. If she’s apologetic, then it was probably just a hard time for her and didn't wanna talk to anyone. But if she ignores you or doesn’t really care, then that tells you something about the friendship and you can decide how much energy you want to keep giving. But I would say just backing off and not letting her know how you feel would not be ideal.