"I totally respect Jake and all the decisions he made," she says. "The only thing that was different for me was, Jake had a really big heart. He felt that he had fallen in love with more than one person. For me, I don't feel my heart is capable of loving more than one person. Going in, I made a promise to myself that I really wanted to make sure that I didn't share those types of feelings unless I was sharing them with one person, and that I was completely positive that that was the person for me."
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This tells me that she has picked one person and did not fall in love with all the F4 and that she could have only loved one person. Therefore, her F1 is the one she only fell for. Not gonna be a Jake edit where he fell for all(loud of cr@p) for his F4.