Instead of saying I don't like to feel vulnerable, are the following acceptable too?
- I don't like the feeling of vulnerabilities.
- The feeling of vulnerabilities crippled me.
I would say, "I don't like feeling vulnerable."
Or,
"I was crippled by feelings of vulnerability" (this is an example of where passive voice is appropriate to emphasize that the speaker is being acted upon by something else)
You should say "the feeling of vulnerability", because vulnerability is an uncountable noun. See Results found on Google Book