...a lot of men nowadays like to 'have their cake and eat it' since too many women give them all the benefits of getting married, without them needing to give the woman actual legal commitment
...in the real modern world- you are presumably sleeping with him as usual? So what incentive does he have to pop the question in the way you imagine? He gets what he most craves and he gets your company.
As unpopular as these opinions are, I completely agree. Human women are about the only species that gives sex to males without expecting or demanding anything in return. Even female insects insist blokes bring them food to eat while they shag!
The modern would is 100% set up to give endless, no-strings, easy, free sex to blokes. It’s been getting worse since the Pill in the 60s and now it’s ridiculous. These days women even disguise they have feelings or emotions just so they don’t look too keen - which actually just translates into “doesn’t even require a phone call the next day”.
If you want to get married within a reasonable timeframe, DO NOT move on with a man (aka become a free wife), and certainly don’t shag them till they’ve proven they’re nice, keen, genuine and reliable.
Don’t be so concerned about your sexual compatibility that you forget other things have to be compatible too - like your life goals, commitment, and desire not to get fucked about.