3rd Wheel

I cannot stand being 3rd wheel. It absolutely drives me crazy. Knowing this about myself, I don't kick it with my friends who are in a relationship by myself.

Why do I loathe it so? I'm not really sure. What I do know is watching two people all over each other while completely forgetting about my presence has never been something I enjoyed doing.

Enter my current problem:

So my friend B wants me to go on a trip with her and another one of my friends, D. I met D through B. D and B kinda are in a relationship, kinda aren't. While I know D doesn't really care if I go, I have a sneaking suspicion that if he could choose, D would choose that I not go so that they (D and B) could have some quality time.

I don't want to have to have this conversation with B. I don't want to have to tell her that I'd rather err on the side of caution and not go because she will go straight to D and demand that I go which in turn will create tension. Especially since this is all based on feelings I have, not on anything that's been said.

Oh, I forgot to mention I've spent the last 2 weekends with them. So while nothing's been said, I've seen all I need to see to know what'll happen if I go on vacation with them...

Guys, I'm a sucker. B will call me, she'll whimper and I'll give in and potentially be miserable. What's really messed up is that if I do make it through B's whimpering, she'll call D and D will call me and demand I go so that B won't be upset. I know, I know, gotta do what's right for me, but did I mention I'm a sucker? Has anyone picked up on how I let my friends run my life (sometimes)?

I was hoping to get lucky and they'd drop this whole vacation thing all together. I was beginning to wonder if they felt obligated to invite me because we've been pseudo-planning this all this time... So when our first plans fell through, I tried hinting that I'd rather go home and got shot down on that.

Guys, I'm fabulous, but I just refuse to believe they think I'm THIS fabulous.