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Someone doesn't seem to be loving the single life!

On Wednesday John Mayer jetted from New York to Los Angeles, and he seemed rather glum when we snapped him walking through the terminal at LAX. John is prepping for his upcoming world tour (his first in three years), and meanwhile ex-girlfriend Katy Perry was happily partying it up at Coachella, so that has to sting a little bit! While the two reportedly split due to hectic schedules, a source tells E! News, "John still very much loves her and has feelings for her. It was just going to be too much with what was on his plate."

Think she'd ever take him back? Or is she on a mission to prove that she's better off without him?