I've lived in our town for 10 years and was the total outsider, new babies, no friends, no family, when we came. My husband traveled all the time. I made the conscious effort to get out and make friends so that my kids would not see me as an isolated person. My parents rarely socialized, we only visited relatives, and it was very boring to me as a child not to have more friends.
Thank God I did that networking, because now I'm a divorced single mom and I could feel REALLY alone, but I have lots of friends because I made that happen. I also had lots of support through a painful time from those people when my marriage fell apart.
I have to make way more effort than everyone (it seems, maybe not) to show up at stuff, host stuff, initiate stuff, etc, because couples are busy little units of their own and it's hard to break into that world. It's hard to show up to something where I don't know anyone, with three kids, and start initiating conversations and all that. But rewarding!
Last night I was at Christmas party with some people in the town who had never met some other people I know, and I invited the others, and they all met...it's a nice community growing. And from nice communities come nice ideas and good experiences.
Not only should you go to the party, you should try much harder to be engage and be interested in the people attending. It's very kind of them to keep inviting someone who might seem to have little interest in them. Go, have fun, make real friendships with these available people.