Finishing That Novel

I've been working on my novel "Savage Lust" for about two years now. I've already written the last chapter, so I know how it ends. My goal was to have the book contain 100 chapters. (they're short for faster pacing) I'm currently on chapter 75 and while writer's block isn't a problem, I seem to be putting off finishing it.
My wife says I'm afraid to finish it. I denied it, but she may be right. When I think about it, this is something I've worked on for the past two years and it's about to come to an end. Although I must say, I could easily make it into a series. Which I would like to do. So it's not like the characters will end with the ending of this book.
I wonder what is going on in my thought process. Am I afraid it won't be published? Am I afraid of putting it out there for rejections? I'm not sure. I do believe it has potential. I'm very satisfied with how it has turned out so far. I'm just not sure why I keep putting off finishing it.
I wonder if other authors have feelings like this when they are about to finish a book. One would think I would be ectatic at finally getting it finished.

One thing that has bothered me about writing a novel is that, at heart, I'm a poet. Since beginning my novel, I've hardly written any poetry at all. It's been two years since my last poetry book came out and I don't have enough to fill another one at this time. Mabey I need to decide what I want to be, a poet or a novelist. And why can't I be both?