Mary-Kate snuck in some kisses while out to lunch at Barbuto with her boyfriend Nate Lowman in NYC on Friday. We've been hearing rumors that she's had this new artist man for a while now and seen her with Nate [1] before, but this definitely seals the deal, and it's so cute. Plus, they've got matching plaid shirts. These photos might not be quite as amazing as last week's 55-photo Ryan/Rachel love fest [2], but I do love seeing the Olsen girls so happy.

[2]

Splash News Online [3]