The boy is hers. Ariana Grande seemingly hinted at a future with boyfriend Ricky Álvarez during the final stop of her “Eternal Sunshine” tour in London, England, on Tuesday. Grande made yet another cheeky change to her “thank u, next” lyrics, this time singing, “Wrote some songs about Ricky / I’m tryna make him my last,” instead of the original, “Wrote some songs about Ricky / Now I listen and laugh.” The crowd immediately caught onto the change, cheering as the “7 rings” singer, 33, laughed after singing the updated lyric, according to a video shared by Entertainment Tonight on X. Grande previously raised eyebrows with another lyric tweak…