You know missypie, I'm not going second guess your instincts, because you are there and you know these folks. If that is what you think is happening,
chances are you are right.
And I'm sorry....

. I had the same thing happen to me a while back at work....a bunch of girls who I considered my friends (and who I thought considered me theirs) planned a day at the casino and left me out. Didn't try and keep it a secret either....just didn't include me. Made sure they told me afterwards what a fabulous time they had too! Then, a couple of months later, one of the girls was getting married and I was told "it's your turn to do a shower". My response was "Perhaps one of you gals who's closer to the bride could do it. I know a group of her closest friends went on a trip to the casino recently...probably one of those girls would be best to handle a shower for their friend".
What I wanted to say was "Yeah, I'm a big fat idiot who is going to let all you people use me and my house and spend a fortune on a bridal shower for someone who doesn't give 2 poops about me, because I am so thrilled that you have deigned to include me in the group when it is an event that is going to cost me money. I don't think so".
Amazingly enough, I had another commitment the night of the shower, so I couldn't attend...what a shame.
But, it was a good lesson to learn. Now this same group seems to be trying to re-include me and I am completely not interested in their company. I'm just always busy, busy, busy!
And yes, some women do always act like Junior High girls. Those are the ones I avoid now. I recommend you do the same.