bff didn't tell me about engagement but invited me to the wedding

Hey!
I am looking for a bit of advice from the outside. I got married last year and my BFF was my MOH. I made sure the hen do was organised to fit also her schedule. I told her the date as soon as we got it because I knew she needed to travel for both wedding and hen do. I called her when I got engaged. I organised calls to keep her in the loop and introduced her to the others in the wedding party. She even stayed at my place for the two nights although she never asked and never communicated her arrangements as asked. There were bumps but obviously I thought they were small and in the grand scheme of our friendship, I thought it was minor.

On my hen do, she told me she was planning to get married. She wasn't engaged but they were thinking about it. At this point, I didn't know she was in a relationship despite having had several calls and checked on her previously so she had the opportunity to tell me. It was also a bit weird to tell me at my hen do - but I was happy to let that slide. After I came back from my honeymoon, I regularly texted her to check up on her (we don't live in the same country). She ghosted me twice. Once in November and then in December when I wish her a happy holidays and NY. It was her birthday shortly after that and I sent a card. She messages me without acknowledging the messages she didn't reply. Then I learn that wedding is still on the cards, I ask her how things are going and from the sound of it, she has been planning it for a while. She didn't give me any details, only it's been a while and we are waiting on city hall confirmation. I told her if it's a weekend, I would need to know in advance because I work weekends and would need to take several days off. I also don't make a lot so I would need to save because it's in a major capital where I would need accomodation too.

Then she tells me she is in my country for work for several months (when she is already there). When I asked her if this was happening several months ago, she didn't reply to me. She doesn't make any plans, I don't know if she is waiting for me to make them. I said I would be open to do something. She didn't try to make any plans. I saw she went on a trip we were talking about last year with another friend which made me feel like if she wanted to do something, she could ask. Especially when I made plans with her and made the effort before.

So now she tells me there is a date. I congratulate her and everything. She doesn't give me anymore details and says to let her know if I come. Apparently, something should come once she has all the details of her other guests (who all live in her city). From when she mentioned her potential wedding at my hen do, I know she wanted a bachelorette party but I haven't heard anything. It makes me think I am excluded from it. I think she also should have let me know details so I could book travel since the wedding is only four months away. Flights are now over 300 and accomodation is over 100/night. I would need several days off (at least three) to make it. I don't even want to go anymore.

I feel like I am not wanted. I feel like she has been keeping me in the dark on purpose. I think she knows I won't say anything now because I don't want to add to potential pre-wedding stress and make it about me. I feel like she is sending me a clear message that I am barely an acquaintance to her when I thought she was my best friend and I thought she at least saw me as a close friend.

I wonder if I should go, or if I am reading this right and she is pushing me out and ending that friendship.