Long story short I am friends with 2 other women. We are all part of a local mums group in the area.
We decided to meet for dinners and all became very close within the last couple of years.
Friend A hosted a couples dinner for her husband's birthday and I couldn't make it as we don't have any childcare in the area.
Friend A and Friend B husband's were talking about going to a concert together and they all agreed to go together.
We all are fans of this singer and they are aware I am a big fan to.
Couple months pass and I see Friend B post a instgram message tagging Friend A saying they finally got tickers etc I messaged her and said oh are you both going together and she said it was a last minute rush getting the tickers and they all decided to go when they were at dinner.
Now I asked them why I wasn't invited and both their reasons where "they forgot" and it "totally slipped their mind"
I can't help but feel really shitty about it and I explained to them how it made me feel. They sincerely think they haven't done anything wrong to me by leaving me out as they clearly have stated they forgot to ask me and my husband to go.
Since hearing their replies I left our whatsapp group and have been focusing on myself as I don't want to be a Plan B or "backup friend"
I just want another opinion reading this.