I don't mean to be the bearer of bad news, but non disclosure however difficult will result in a very traumatic ending of this currently 'awesome' relationship you feel you have.
Don't get me wrong, I have been caught in a situation where I didn't disclose, when the first or second sexual encounter took place, but I quickly either disclosed or cut off the relationship immediately (thank god non of the men are positive today!). One thing that I do remember, is that I had this nagging feeling/guilt of being HIV+ and not disclosing to my partner, actually interfered with the enjoying of the moment, so much so, I was left asking myself was it worth it.
The few times I was on the threshold of a full blown relationship, my disclosure (similar to another member who commented) actually produced a very positive response. In others, the male friend ran like the devil was chasing them...but to these, I said good riddance, I don't need narrow minded people in my life!
So to answer your question, the only thing that you can do to salvage this relationship, is to disclose to the woman you love. Without disclosure, you are lying to yourself and you have to ask yourself how much do you truly love this woman, if you cannot be entirely honest with her? Is that what you believe is "true love"?