Honestly though, she'll probably take it better if you tell her yourself. Otherwise it'll look like you were hiding this from her, and that'll start to bring up uncomfortable questions. :P
haha -- a veeeeeeeery valid point. we're both comfortable and open with one another right now, so I'm very confident that this would fall into the "sweet" category and not the "creepy" category. I'll tread veeeery carefully though :)