I tell myself that I'll take you for the last time
She will ‘take him’ (think about sex in biological terms), i.e. have sex with him one last time, then convince herself that’s it. But this happens time and time again. Also, the idea of “taking him” is comparing him to a drug. It’s as though he is an addiction she cannot quit.
To help improve the meaning of these lyrics, visit "Till Dawn (Here Comes The Sun)" by The Weeknd Lyrics and leave a comment on the lyrics box