If you read David Burns "The Feel Good handbook" he makes the point that showing vunerability is a condition to get someone to love you.

What does "vulnerable" mean in this context? People use the word a lot, but nothing listed against it in the dictionary strikes me as a positive thing: susceptible of receiving wounds or physical injury, open to attack or injury of a non-physical nature, in need of special care because of age, disability, risk of abuse or neglect. The general Google hits on the word are even more unattractive.