It's definitely about what you want out of this relationship. It is unfortunate he's not willing to open up to you and discuss why he doesn't want to get married. If I was in your situation, I would feel like I entered the relationship on false pretenses because he initially said he wanted to get married. As hard as it would be, I would stick to what I believe in and push for marriage. However, you know the situation best, and you have to decide if he's worth settling for.
Always tell people exactly how you feel, at that exact moment. If the moment has passed, let us help you:
www.HopeYouGetThis.Com
L’esprit de l’escalier