What do I do?

so a girl that I am close friends with just asked me to be her bridesmaid a week ago, I said yes, assuming the wedding was quite a long time away. Turns out her wedding is in four months in April. But that’s not the big problem here, so there’s me and three other girls, two are other bridesmaids, and one of them is the maid of honor. about four days after she had asked me to be her bridesmaid I had seen on her Snapchat that she went to go look at bridesmaids dresses with the other bridesmaids, but did not invite me. They also had went shopping and went out for food and then went back to her house to have a couple drinks afterwards, and when I had asked why I was not invited at first she said she didn’t think it was my thing and then she said that because I was in between jobs, she assumed I wouldn’t have the money to go. I don’t understand why she couldn’t have at least invited me to look at bridesmaids dresses. then about a day later, after she said she had assumed I wouldn’t have any money. She tells me the bridesmaid dresses are about $300 and then tells me my hair and my makeup will be $200 and I also have to pay $100 for her bachelorette, and I’m assuming that they are expecting a wedding gift. (and if you don’t assume I have money, how would you expect me to pay $700 for this whole ordeal). So fast-forward to today, we went to the dress shop to go and buy our dresses, it turns out that everybody had gotten to pick their color that they wanted to do because she’s doing four different pastels and I was stuck with the color that nobody else wanted. nothing was ever communicated with me about the colors of the dresses. I was never asked what color I would like to wear or anything, but the other bridesmaids were asked. We found one that we had liked at the bridal shop, but since it is already the middle of January and her wedding is in the beginning of April, we would have to pay $100 extra to get it shipped fast, we ended up not getting the dress and we are going this Sunday to look at dresses. I think she expects me to pay 100 extra dollars to get the dress shipped fast, whenever it’s not my fault that the dress won’t be here on time because she had let me know that I am a bridesmaid four months before the wedding. (also, before this whole thing she had started acting very weird towards me for the past year she had stopped asking me to hang out. She didn’t get me a Christmas gift this year, which is not a big deal, but I just find it weird because she gets me one every single year for the past four or five years.) Also not to mention they had a bridesmaid group chat that I was not even included in and they just added me to it today. What should I do about this whole situation? Should I even attend the wedding or be a bridesmaid?

update: I did end up bowing out and i said “I’m sorry I have to bow out of my duties as your bridesmaid. thank you so so much for asking me, and even considering me as a bridesmaid it really means the world to me and I truly do appreciate it. But this is a little out of my budget and all happening to fast for me to come up with so much, when you had asked I figured the wedding was at least six months in advance, I ended up doing some of the math last night and with all the money I would be borrowing for everything, not even counting altering the dress that would be almost my whole first paycheck from this job and I still have to finish paying off my schooling and pay $150 to register as a pharmacy technician. I also do feel kind of left out between me not being invited the other day also I just kind of feel like I don’t belong and it kind of makes me feel like a last resort, but I really still want to celebrate with you and support you on your big day by being one of your guests if you would still want me there. I really hope this doesn’t affect our friendship in any way. I genuinely am so excited for you and —“

All she had to say was “thats not a problem.” shes most definitely mad and im most definitely not invited to the wedding, but honestly i could care less after i made my post i went and calculated everything (dress alterations, bridal shower, hair and makeup, shoes, the dress and to have it rushed shipped, wedding gift and what i have to pay for the bachelorette party plus food and drinks there) It came out to $1,600 I absolutely refuse to pay that much with how im being treated.

All in all im pretty sure I lost a “friendship” if i can even call it that. but honestly I could really care less we already barley talk and dont even hang out anymore. Thank you all for reading my post and taking the time to give me your advice.

another update: she texted me again and said “Hey I’m sorry I hate my response. I absolutely still want you to be there! And thank you for letting me know how you feel 🥺 ik we have drifted but I love you so much I miss seeing you and hanging out every weekend. I can’t imagine getting married without you being there. I’m sorry for everything I’ve done that hurt your feelings I promise it was not intentional!❤️”

I absolutely appreciate that she said that and after she said that I genuinely do forgive her since she is being so understanding and apologetic