I went through this a lot last summer with my group of "best friends," and one in particular (who is now my roommate) would talk about it all the time yet never mention inviting me, or give me a reason for not inviting me, or anything. I'm just warning you, if your friends are anything like me (I'm not one of those people to deal with an issue by ignoring it or talking bad about someone behind their back) this could turn ugly, so you betta have good reason not to have invited those people! :P (Though teenagers nowadays are too scared to confront an issue head-on 99% of the time so you may be good..)