Kanye West & Taylor Swift -- BFFs Do Dinner ... Before the Duet

The Kanye West/Taylor Swift friendship is the real deal, folks -- and not just for music -- because they did dinner together at The Spotted Pig in NYC.

Yeezy and T-Swizzle were careful not to arrive or leave the restaurant together on Tuesday night, but they reportedly ate at a table for two.

The unlikely alliance began at the Grammys when they reunited for a photo. Since then Kanye's said Taylor wants to do a song with him, and this dinner date definitely makes it seem more likely.

Face it ... Sweezus is here to stay.