I agree. The big question is why you would put up with someone who has you as such a low priority. Maybe you don't want to give up after 5 years, but how long would you tolerate such a lack of consideration? 6 years? And why the heck would you even think about marrying someone who has such a low regard for you? How fun would that be? Think about cutting your losses, remembering the good stuff, and moving on. You may be thinking of him as he once was, not as he is.
It's hard to come to any conclusions with so little feedback from him. You're left to imagine and conjecture, with little input from him as to why the tides have turned. So don't wait for it. Why is is up to him what happens to you?
I once was engaged to a guy who left me abruptly, with no feedback or explanation after a 2-year relationship. (I eventually figured it out: he was only 5 years older than me, but had seen so much more of life that I seemed like a child to him. He had figured that out first, but neglected to share his insights, which would have been nice.)
So I was confused and sad at the time, but I was clear enough to knew I didn't want to pursue someone who didn't want to be with me, for whatever reason. Turned out to be the best thing. After some rebound men, I met the love of my life and we've been married for more than 20 years.
Bundle together your self-esteem (borrow it or fake it if you don't have enough) and call it a day. Trust me, it's not the end of the world.