Friends Have Vanished

Has anyone had a severe decline in friendships since announcing your pregnancy? My friends have fallen off the face of the earth. They were so excited when we announced, wanted to plan or be at the gender reveal (didn't happen) and insisting I better invite them to the baby shower....yet they've completely disappeared. Like, I haven't seen them in months and there's been a few text exchanges. I know, it goes both ways, but even when it's talked about to get together, nothing comes to fruition. I'm kind of disappointed, but I certainly don't expect to be on everyone's mind daily and I know I'm less exciting cause im pregnant, but really, hardly any contact these days.  Do I invite them to my shower? Would I be wrong if I didn't? I just don't know anymore, it's an awkward feeling. Advice?