Hi there, I found it very hard at first to make friends with other mums in my community.
I knew a lot of them, but it never got past the 'say hello in the street' stage.
Then one day I pounced on someone leaving a doctor's appointment, she had children, she looked like I would like her, she was new in our little town, I had to take my chance.
We now go on holidays together and look after each others children etc...
I think the key is that you have to actually really like the person you're befriending. I would often moan to DH about how I wasn't fitting in, but he made the point that I didn't really seem to like the people I was feeling excluded by, and that I just wanted them to like me. Being mums is not that much to have in common really.
Once you have one friend, getting more seems much easier, the edge of desperation has gone.