I've been friends with a group of women for 20+ years. There have been various fallings out over the years, and last year one of them withdrew from me completely - we were both pregnant and she thought I had acted strangely to her and didn't really want to engage, so I've just let it go for now. Anyway, another of the group has been acting very distant for the last year (although texting happy new year to me etc) and I just found out she is having a big party for her 40th, and I'm clearly not invited. We've always been there for each other for major occasions. I feel gutted, embarrassed and really hurt as other friends of the group clearly know about and are going to the party but keeping it from me. I dearly love the women I'm still friends with but have clearly been sort of ostracised at some level.