Friends gender reveal

I honestly don’t want to go to my friends gender reveal. She’s pretty much been mia on me when I’ve been dealing with so much but when it comes to her and what she needs from me she’s front and center to talk about it. Would it be selfish for me to just skip out being as I already know the genders?

Edit to add: I definitely understand her dealing with things she needs. But what’s been getting to me is she expects me to drop the things I’m dealing with to help her deal with the things she’s dealing with. It hasn’t always been that way, she used to be one of my most supportive friends until I had my son, then she got even worse once she got pregnant. I’m feeling bad for putting her off to deal with what I need to deal with but I also feel like I shouldn’t since she’s done the same constantly.