The 27-year-old actor, who has dated her "Twilight" co- star Robert Pattinson, along with Alicia Cargile and St Vincent, said she has always owned up to the "duality" of her sexual orientation, reported Harper's Bazaar.
"I've been deeply in love with everyone I've dated. Did you think I was faking it? I've always really embraced a duality.
"And really, truly, believed in it and never felt confused or struggling. I just didn't like getting made fun of," Stewart said.
The "Personal Shopper" actor, who is currently dating Victoria's Angel model, Stella Maxwell, said she was open to dating men.
"I want to try everything. If I have grilled cheese once I'm like, 'That was cool, what's next?'" she said.