I just joined a group last november. I felt exactly the same way. I don't think anyone does it on purpose; it's just that they already know one another and migrate towards those they have already gotten to know. I have been there 6 months now and I love it. We have a once a year quilting weekend and I went to that and was amazed at the friendship I found. I am now part of their sewing bee which meets once a month. Also, I volunteered for a committee job which has helped me get to know even more people. But, I know how you feel. But, you should join and I recommend volunteering to help with something. A great way to break the ice.
Diane in Garnet VAlley, Pa. Member of Brandywine Valley Quilters.