Vulnerability is different than over sharing inappropriately, or not understanding boundaries, and generally TMI. You don& need to be vulnerable with everyone as a test. Just be authentic and don& take yourself too seriously.
"Daring greatly means the courage to be vulnerable. Brene Brown quote (Please ignore the I think since we as a society already don't know how to "get married" that "stay married" is quite a dangerous thing to propose for Most marriages)