Peas in a Pod - I could have written your post. I've been feeling increasingly lonely over the last week so it's a subject close to me at the moment. 
We moved house and area a month before our first baby was born so my pre-baby friends don't live locally. That said, none of them have invited me out once for a night out since my son was born 3 years ago (the majority are childless).
I know lots of mummies in the local area. When I go out to playgroups I always see people I know and are never short of people to talk to. But i always feel on the periphery of groups. I think half my problem is that people assume I have a set of people that I go out with, but the truth is I don't.
I don't see much of my NCT group as one of the girls has made it her business to isolate me from the group. She is a nasty piece of work with a big chip on her shoulder about something and basically (I think) doesn't want me around because she wants to dominate the group and be 'seen' as the leader. (I don't even want to be the poxy leader, but I think she is threatened my my existence!) She has been very nasty to me in a very underhand way (that the other girls aren't aware of) and I think this has dented my confidence alot.
In a similar way to Madonna, I've used Archie's 3rd birthday as an opportunity to meet new mums and, in particular, the nursery mums who I think are a lovely lovely group. In fact I've since taken the initiative to arrange a night out next week as a 'Nursery Mum's Social' and I've had really good interest in it from the others, so I'm hoping this may be the start of some new friendships.
x
Archie Benjamin - January 2007
Imogen Sophie - April 2009