Now I’m waiting up (got you waiting)
Now I’m waiting up (ooh, got you waiting)
Now I’m waiting up
Now I’m waiting up, waiting up, up, up…

from Drake (Ft. Riz) – Waiting Up Lyrics on Rap Genius

Hes realizing how connected he is to this girl but he does not want to seem desperate so hes just sitting there waiting for her to get back to him. The only reason he is waiting is because she means so much to him.

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