This has apparently been around for quite a while, but BoingBoing just linked to an amusing Brian Weatherson post listing some philosophical break-up lines. My favorites:
The Humean: Just because weâre always together doesnât mean we BELONG together.
The Quinean: Iâm sorry, but you donât mean anything to me anymore.
The Content Externalist: Ever since we moved, youâve changed. (It’s hilarious if you read Putnam, just trust me.)