women who present as "having it all together" usually are doing that for a reason. leading with strength and independence and reluctant to show vulnerability EVEN after a 1.5 year relationship is a fearful woman, in my opinion.
i personally naturally tend to "lead" with my strength and independence a bit like that, but my walls come down immediately with trustworthy people who make the effort to know me, and certainly with friends and relationships. however, years ago, before i re-dedicated my life, i was about as accessible as fort knox and wasn't ready to deal with stuff until God forced me to.
she's got stuff to work out -- i don't know what her history is, but maybe you can provide the catalyst to help her deal with the reasons why she's feeling so insecure and needs to compulsively control you or others. your brutal honesty could be a glass of cold water to help her walls tumble down. on the other hand, she may not be ready to address the root causes in her life and surrender herself to God completely yet.
but she's locked up for a reason. and most people aren't self-aware enough to do that on their own, so yeah, counselling.
One simple thing, like that, spoils or hurts; but I think it deserves an extra effort (if she allows, when you've prayed).