Don't mistake desperation for "courage". (wry grin) I'm not sure what it says about a person when they form better relationships using electrons than they do using traditional means of communication. Sometimes it is far easier to reach out to a stranger than to a proven friend, though.
I don't know where things stand with you and your lady right now. I can only point out that too many "secrets" can be death of a relationship. Save your secrets for those things that are hurtful when shared. I won't hold you to your promise not to tell her, but instead will rely on your proven good judgement to tell or not tell as circumstances demand. Trust is essential in a relationship, and the best way to demonstrate trust is to entrust. (The wording is a little circular, perhaps, but none the worse for it.)
Taking a page from my own book ... I trust you, Friend. Also, the Professor and I are going to beat the crap out of you and your lady next time we play Trivial Pursuit.