I dislike cliche love songs. I think they're cheesy.
Think I'm In Love by Beck (youtube link) is my favorite love song. It's cute in its own way and it's about realizing that you love someone a lot and how that also scares the crap about you. I think it's really adorable and relatable.
the frist that comes to mind is the Tsuami Bomb's song Mush Love Song, or my personal favorite which my partner haas dedicated to me on occasion, Pants by my all time favorite band Lemuria. I also love all those cheese radio pop songs about love and stuff.