Rapper Big Sean has revealed the reason why he doesn't like to talk about his romantic relationship with songstress Ariana Grande. 

Speaking to Billboard magazine, the star explained that he has so much respect and admiration for her, which means that he feels uncomfortable discussing their combined personal lives with the world's media:

"She's supercool -- the coolest. Ever since, we've been friendly, hung out once in a while, and it just evolved. I respect her -- so I don't think I should talk about it."

Big Sean recently told Complex magazine that they have an amazing connection that is more real than anything he's ever experienced: "It’s not some fake-ass, inauthentic sh*t when I say we were friends. This is something special and I appreciate every moment of it."

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Watch Grande and Big Sean performing live together here: