"Alejandro" is the 3rd single from Lady Gaga's 2nd studio album: "The Fame Monster". It was written by Lady Gaga and RedOne. Every song in the album represents a "fear" of some "monster". This song, in the words of Gaga represents "The fear of men monster".
I know that we are young,
And I know that you may love me,
But I just can't be with you like this anymore,