Vulnerability is the bedrock of a healthy relationship. A willingness to show our vulnerable sides and know that it is accepted and understood nourishes a relationship. Yet culturally, putting ourselves in such a position is considered a sign of weakness. Yours is quite a predicament. While opening up to your partner about your fears is exactly what your relationship needs, your hesitation is understandable. But here is an important thing to consider. If we reveal our vulnerability and the other person doesn't understand it, what happens to us? True health lies in accepting that even if she doesn't understand, you're fine. What she may think about your feelings do not make you weak or unworthy and nor do they make them "wrong" or "bad". So before you choose to tell her this, it might help to think about your own self worth. Do you value yourself and your beliefs? Do you consider them valid, regardless of what others think and say? When opening up to others we risk getting hurt. But that is inevitable. The important point is that can we take care of ourselves despite it? Reflecting on this may help you gain better insight into what to do