Maybe you could take it in smaller bites? You don't have to share everything all at once. Maybe start with how you think about her all the time, wonder about her life, wish you knew more...etc. Then see how she reacts. My T assured me that it was very normal to be curious and she was honored that I cared and even flattered. It took me a while to take by over time I was able to share with her some things I found, and once again she normalized it for me which has helped ease the obsession tremendously.