Merissa dated Peter for five months in 2012 and will be appearing on tonight's episode of The Bachelor to warn him about Victoria, as even though their "great relationship" didn't work out, she still wants the best for Peter and doesn't think Victoria is good for him, Us Weeklyreported.
Merissa -- who lives in the same Virginia Beach area as Victoria -- said she met Victoria through mutual friends years several years after she dated Peter.
"We became friends when I moved back from Los Angeles about three years ago," Merissa said.
"Our first encounter was that she told me she was going to slash my tires because I was hanging out with one of her ex-boyfriends."
Merissa clearly wasn't a fan of Victoria right off the bat, but the girls were allegedly forced to hang out with each other again since they ran in the same social circle.
"Virginia Beach is a pretty small town. As time went on, I became friends with a girl who was best friends with Victoria," Merissa explained.
"And so we all kind of started hanging out and it just became more of like a forced friendship versus like... I wouldn't, like, voluntarily go hang out with her."
Merissa admitted Victoria's casting on The Bachelor's 24th season pretty much sealed their fate that they'd never be sincere buddies.
"Obviously I had my moment because I'm like, you could possibly be with my ex-boyfriend and that's a little weird, but like, I never asked her not to go on the show or anything because that's silly," Merissa shared.
"But we went out one night for our friend Audrey's birthday and it turned into the Victoria Fuller Show because it was three weeks out that she was about to leave forThe Bachelor and she just became a very self-centered person and we were all out for our friend's birthday and she was just acting crazy -- just wanting all the attention and it was very distasteful."
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Fame allegedly went to Victoria's head quickly, even before she actually began dating Peter and filming the show.
"She's like, 'Do you know who I am?' And I was just like, 'Where is this coming from?' So that just really rubbed me the wrong way," Merissa admitted to Us.
"And from then on... I told our mutual friend, I was like, 'Look, I'm never going to hang out with her again. She's crazy. She literally has no respect for anybody around her and I just don't want to be associated with that.'"
Merissa said she's especially annoyed Victoria portrayed herself to be a shy woman who's never the most outgoing girl in a room on the show.
Victoria acted quiet and meek when getting to know Peter and claimed she had trouble standing out in a crowd and getting his attention. Victoria complained the process was very challenging for her, but Peter promised the bachelorette he found her vulnerability and insecurities real and endearing.
"If there is a guy she wants, she's like, 'He's mine.' There is a one-way street there and nobody else is getting involved. She just thinks that the world revolves around her and she's the hottest thing that's ever hit this planet," Merissa insisted of the medical sales representative.
"And actually the most disturbing thing so far of all of this was the lingerie episode that she just acted like she was this coy person. The people in Virginia Beach are even seeing that that's not you at all. You're always the one in the bar wanting attention."
Victoria has yet to provide a comment on her past friendship with Merissa, but she previously mentioned online rumors in an Instagram post.
"There will be a time & place where I can defend myself, but for now I choose to wait," Victoria reportedly wrote. "HOWEVER, bullying is NOT ok. Nor is it fair. Especially when casting judgement and basing opinions upon pure speculation, assumptions, & LIES."
As for Merissa's relationship with Peter in 2012, she called it "casual."
"I got to meet his parents and his brother and we would just, like, hang out at his parents' house and go out to lunch or dinner or whatever," Merissa said.
"We were friends for quite a while after [our breakup], but then I was in a serious relationship and Peter had started dating someone else as well, so we really didn't chat too much."
Victoria will reportedly have an unprecedented hometown date during The Bachelor's next episode on Monday night, and according to Reality Steve spoiler blogger Steve Carbone, Merissa will make an appearance and warn Peter about Victoria's character and reported scandalous past.
Victoria's reported scandalous past allegedly includes several affairs with the husbands of some of her own friends.
Click here to read spoilers on what happens during Victoria's unprecedented hometown date in Virginia and the rest of Peter's season.