Thank you all for your advice. After thinking, I am moving forward - plan on going to the wedding. I thought about calling, but knowing her personality, that's probably not the best idea.
The more I think, the more I realize that I need to move forward. In the past, I'm the only one who make contact (Calling, texting, etc.), and one thing that has bothered me since I found out Tinky was sick was that she never texted, called, or anything. I know if the situation were different, I would be checking on my friend and her pup.
I think I am going to wait and see if she includes me in some of the activities (picking out wedding dress, bachelorette party, etc. ) before I reach out to her. I would feel much better if I am involved a bit, even though I'm not in the wedding party. We shall see...
I like the advice of finding friends that are as involved with their pups as I am. And I love engaging people in their animals. I work on campus at a university near our campus lake where a lot of people bring their pups to walk - I always get too excited going into work when I pass a person and their pup and can make conversation