Seeking expert testimony is a sign of strength. A personal relationship with a caring professional is proven clinically effective.
I believe that I can help.
There are two things that have disturbed her.
The first is that she has discovered your "secret" blog in which you reveal you innermost thoughts to the world in general and to which she has not been privy. She seems this as some sort of emotional betrayal.
It was very difficult to suddently see you as an outsider, very separate from her, and holding back your thoughts.
Your thoughts were not evil, but an honest look into the nature of human relationships, following the guidelines of your own experiences. She felt left out, abandoned, and betrayed.
Secondly, she felt that she was not good enough for you because she could not stir you to the heights of passion that she imagined you felt with others, in the past.
This kind of passion is not as long lasting as the true emotional ties and love that you seem to have with her. Making her understand this by restoring her confidence will require a very indirect approach.
She will be wary of you trying to make up for it so you will have to go slowly and carefully.
You seem to have a very broad basis for maintaining this relationship and will have to proceed cautiously. I recommend the following book for help, instruction, guidance, and inspiration:
The author has written several books on the subject and they have been well received for their ease of reading and effectiveness.
You can order the book in a printed version or can download the electronic version (Kindle version) now onto your computer and be absorbing this wisdom in minutes from now if you choose to get it.
I believe that you will get past this. Stay positive, don't argue with her, and show her lots of love and patience and you will overcome this obstacle and grow even stronger.
Elliott, MAE, LPCC, NCC, CCMHC