okay, so what it sounds like is that you state your needs clearly/hold him accountable for his two-faced behavior. Thats not "acting up" (though it should be done in a mature manner).

look, he's not going to propose to you, and would you really want him to at this point? He wouldnt be doing it bc he truly wants to, he'd be doing it to appease you which is an awful way to begin a marriage. I have a feeling this is only one thing of many that isnt working in your relationship