Invited to baby shower but not wedding

Just curious on everyone’s thoughts. I’m not sure how I feel.

A friend from high school (close friend during High school) didn’t invite me to her wedding. Now I’m 30 so we haven’t really hung out since high school, 12 years ago. But I see her in group settings of friends we have in common. We invited her to our wedding but that was 5 years ago and we were more involved in the same groups at that time...I also had a huge wedding.

Now I haven’t spoken to her since my wedding but I just got an invite to her baby shower. The only reason I feel it’s weird is I wasn’t included in her bridal shower, stag, wedding anything but now I get an invite to her baby shower.

I am honoured to be invited but also a bit hesitant. Our entire group of friends was invited to the wedding where I was not so I took it as she wasn’t wanting to continue a friendship. But maybe I’m wrong! Would you go to the baby shower? Am I just being petty?