Thanks to everyone for their advice, DH and I have sat down and come to realise, as much as we didn't want to. that we are really kidding ourselves to think I will be able to go through with being a BM as there is so much uncertainty surrounding the PG and all.
I will assure my friend that I will still act as an "honorary" BM and help her out with everything, invites, etc See the 3 other BM's are overseas and I am the only one here to help so I want to make sure she doesn't feel like she is losing it all.

We are going to sit down with our friends most likely this week-end and bring your posts with us and at least myself will not be part of the bridal party and share our decision and have a good ol' chin wag about it. I would not want DH not to be part of it and will also be discussing with my OB at the end of this month and work out a plan of action ( maybe get induced to be sure I can be there)

My only concern left is as I am only about 7 weeks in, there is a chance ( and I really can't stand the thought to be honest, it scares the living crap out of me) that I may not carry all the way through, so I guess this is something we will all discuss as to whether we want to wait 12 weeks before making a final decision, and whether they still want DH as well consiedering there is a risk of me still being in hsopital.

So will let you know how it went, but a BIG thank you to you all as this has made my decision not easier but a much more informed one anyhow.

Moose