There is a deck called the Lovers Tarot. It is collage, and has unillustrated pips. My copy was a gift - sadly, I don't often use it any more. In the packaging it advertises itself as a deck designed for romantic readings.
I like joie deck vivre and shadowscapes for relationship questions, or questions involving the heart. I've had a few decks and gifted a few decks....my collection revolves when I find someone who is perfect for "such and such deck" but both of those two work for me right now.