Don't Panic! This greet is Sagan-approved (probably) for your space geek sweetie.

The truth is I grew weary of seeing the same "Love you to the moon and back" quote on everything. Everywhere. It made me think about how close the moon actually is, and maybe I'm missing something (with astronomical likelihood), but a love that shoots out past super far stars and presumeably doesn't get sucked into a supermassive black hole while it circles back around the universe? That's love worth mentioning.
Wait. Is that what the song 'Across the Universe' is about? See, The Beatles would get this whole Betelgeuse thing too.