The 29-year-old pop superstar opened up about the the decade-long drama, referencing the rapper's slight at the 2009 VMAs and the infamous phone call claiming Swift agreed to his lyrics in "Famous" calling her a "bitch".
"I realized he is so two-faced. That he wants to be nice to me behind the scenes, but then he wants to look cool, get up in front of everyone and talk shit. And I was so upset,' the "Me" singer confessed.
The bad blood between the two began when West interrupted Swift while she was accepting her Best Female Video at the 2009 VMAs. "Yo, Taylor, I'm really happy for you. I'mma let you finish, but Beyonce had one of the best videos of all time!" West shouted in protest to Swift's win.
"When someone doesn't respect you so loudly and says you literally don't deserve to be here -- I just so badly wanted that respect from him, and I hate that about myself, that I was like, 'This guy who's antagonizing me, I just want his approval.' But that's where I was," she told the magazine.
West apologized and their relationship seemed to be on a better path for a brief while, according to Swift.
"I started to feel like we reconnected, which felt great for me -- because all I ever wanted my whole career after that thing happened in 2009 was for him to respect me."
"And so we'd go to dinner and stuff. And I was so happy, because he would say really nice things about my music. It just felt like I was healing some childhood rejection or something from when I was 19," she added.
However, things spoiled again for Swift after she felt "duped" by West when they were to reconcile publicly at the 2015 VMAs.
"He called me up, maybe a week or so before the event, and we had maybe over an hour-long conversation, and he's like, 'I really, really would like for you to present this Vanguard Award to me, this would mean so much to me,' and went into all the reasons why it means so much, because he can be so sweet. He can be the sweetest. And I was so stoked that he asked me that."
"And so I wrote this speech up, and then we get to the VMAs and I make this speech and he screams, 'MTV got Taylor Swift up here to present me this award for ratings! And I'm standing in the audience with my arm around his wife, and this chill ran through my body," she confessed.
Again, West attempted to make amends. "He wanted me to come talk to him after the event in his dressing room. I wouldn't go. So then he sent this big, big thing of flowers the next day to apologize. And I was like, 'You know what? I really don't want us to be on bad terms again. So whatever, I'm just going to move past this.'"
But moving past it meant Swift accepting the call from West regarding the lyrics about her in his soon-to-be-released song "Famous". The song eventually contained the line "I feel like me and Taylor might still have sex, Why? I made that bitch famous."
"So when he gets on the phone with me, and I was so touched that he would be respectful and, like, tell me about this one line in the song. And I was like, 'OK, good. We're back on good terms.' And then when I heard the song, I was like, 'I'm done with this. If you want to be on bad terms, let's be on bad terms, but just be real about it,'" she detailed.
Swift denied agreeing to the lyrics even after West's wife Kim Kardashian shared a recording of the call that appeared to back-up the rapper's claim. But Swift said there was more going on behind the scenes that led her to disagree with him using the language.
"The world didn't understand the context and the events that led up to it. Because nothing ever just happens like that without some lead-up. Some events took place to cause me to be pissed off when [West] called me a bitch.
"That was not just a singular event. Basically, I got really sick of the dynamic between he and I. And that wasn't just based on what happened on that phone call and with that song -- it was kind of a chain reaction of things."
Swift ended the candid session by mentioning her exhaustion of the feud subject.
"I really don't want to talk about it anymore because I get worked up, and I don't want to just talk about negative shit all day."