I think you did the right thing, I have a sister and I don't want any slacker beating around the bush either.
Even though they say the world is now a equal. It's not, guys may have up to a age (Maybe late 30's) where they then want to settle down and more often then not they don't have trouble meeting another lady.
But for women to do the same thing, it is much harder for them to find the right partner at that age. Sure it's okay to live together and not get married if and only if both parties agree to it and understand.
But if one person wants to commit and the other feels pressuried then they are not ready to commit. And this is basically a fork in the road where you both must make your decision. Some people grow apart like what you may have just described.
Maybe one or two years is fine.... three is touching it.... (but is okay if finances is a problem) .... but once you are in that point of the relationship of being together for a long while... there must be a commitment process.
Normally if a woman wants to be with a man, a commitment will be on the table further down the line unless they both understand that it's just dating but when it turns serious it will most likely turn into a marriage down the line or what choice pleases you. Some guys are oblivious to this and just needs a wake up call.
Talk to him to see if his serious, if he just wants to date longer thats his choice... but if you can't wait for his commitment then you can't wait.
It's just indifferences and you have to do what you need to do.
Even if that means leaving him for someone willing to settle down. No ones getting any younger.