Am I jealous or is she
Long story short, have been with my dp 15 months, he has a female best friend who I've basically bent over backwards for, she is quite hard work, thought we were getting somewhere though as socialise in a group quite often.
However she has form for ignoring my texts to her, whilst replying/or sending my dp a message/text, they speak nearly every day, I was upset by this as I thought it was rude to ignore me, but dp said he couldn't understand why she wouldn't reply to me.
Anyway dp and I got engaged about 5 weeks ago, wedding is at end of September, I was the one to tell her when we were out for dinner with another friend, she didn't really respond with congratulations and texted my dp when I got home saying "big news eh" I saw her a few days later at the same friends bday party and she refused to speak to me, she hasn't spoken to me since.
When we sent out the wedding reception invites, I noted on the back to rsvp to me as I have FB and my dp doesn't, and not all invites have my tel no, (she does). She texted him saying "oh your invite arrived today" didn't let me know.
My dp wants her there for the day as well, ceremony then afternoon tea as wedding breakfast before reception, sent invites out last week with a menu to preorder food, no response from her.
My friend who is organising my hen has asked me if I want to invite this girl to it, I'm not sure I do as I feel she is being very rude and disapproving of our marriage and I feel she would have a long face during the hen and also wedding day, I can't not invite her to the wedding as dp gets on with her so well and I need to consider this, but I don't understand how or why she's gone so cold on me.
His background with her was they met on a dating website about 2 1/2 years ago, went on one date and decided better off as friends. I know there's no threat on the feelings side and she has a dp that she lives with who she's been with a year.
Thoughts please?