What about the famous line that women use "I gave you the best years of my life!"
I have only actually heard of women blaming the man of wasting their life if the man doesn't end up proposing after so long together. This is pure manipulation. In this case, the man is doing nothing wrong if he isn't ready to propose just as a woman is doing nothing wrong if she chooses to walk.
One of my exes tried that with me once. The relationship had become too toxic so I decided to end it. So she tried to pull the "Wasted my prime years of my youth" card. I simply said, "No, you were simply enjoying good treatment in a good relationship with a man who treated you like a queen. Nothing more!"
I just can't stand it when people think you owe them your life just because they spent an amount of time with a you. Heck, you gave them years of your life too!