I posted before about a very awkward engagement party I went to with my family. We weren't introduced to any other guests, or offered any food or drink. The other guests were frosty and we just sat there on our own feeling rather out of place. An opinion from here was that as we had received a Facebook invite, we had been invited accidentally.
We have since not been invited to the wedding, which just reinforces that we were not altogether welcome guests.
Wibu to message the bride to be and ask if we were invited accidentally, and perhaps say that even so, the lack of hosting was very rude?
I see her constantly posting about the wedding on Facebook, and think it was rather rude to just invite us to the engagement party, and not make any effort at hosting, then not send a wedding invite.