It seemed a lot easier to post a new thread than to try and tag everyone who commented on the first one.
First, thank you to everyone who offered advice. It is 100% whole heartedly appreciated and equally as wonderful to know there are a bunch of Internet strangers willing to help each other out.
Second, we talked. It went well. I expressed my concern over the delay and that it made me insecure about whether or not he was serious. The papers are signed, I was wrong in that information (which I put in some of my replies, I should've edited the post), but the reason they're still here is that he hasn't had the time after work to go to the clerk's office (he works 7am-5pm). He also said he's avoiding the potential headache. After I explained how it was making me feel and the concern it was causing, he said he's going to take a day off next week and file the papers. I also, because there were some people that pointed out the double standard that happens, said that any marriage talks need to be equal - if he's comfortable bringing it up, he should be comfortable with me doing the same. I reiterated that in order for our relationship to move forward, not necessarily marriage but progress in general, the divorce being finalized was necessary.
I don't think I missed anything, but I may have. I told him it made me very worried that he hadn't done anything with the papers while he knew it was important to both me and our relationship. That was met with a lot of apologies. I also told him I was in no rush to make sudden movements in the way of an engagement or marriage, but that I took those conversations seriously and he agreed that he does as well, so it's good we're on the same page with the meaning of those talks.