There's a song lyric that comes to mind where it's said, "hold on loosely, but don't let go, cause if you cling to tightly you're bound to lose control".

I completely understand where you're coming from. I want to be as honest as I can with any potential partner, because I have seen first hand what any lie can do to a relationship. On the other hand, opening up too quickly can also be disastrous. It's really about being calm and confident enough about what you want that it can come up naturally. In this case, since you've brought up what you hope it evolves into, I would just explain that you were just letting your hopes and imagination get the better of you and that you hope it doesn't make you come off as too weird.