I am both!
I have a lot of close friends and I belong to a few groups (like Book Club, Bunco, PTA, etc) and we get together quite a bit. But I LOVE to be home, in my sweats/jammies with my kiddos. I talk on the phone a bit with some of my closest friends, and enjoy a good book in my comfy chair. I used to be a total homebody, not wanting to go anywhere, but then I found I was hiding behind my kids and only went places that involved my kids (that's natural, yes, but I went out of my way to avoid going places that didn't include/involve kids). So I've worked on getting out there more, and I've made myself a solid promise that if I make plans with friends, I do NOT CANCEL unless it's an absolute emergency.
I'm happy with it, and that's what counts, right?
Gayle