[Bachelor in Paradise Spoiler Warning: This report contains spoilers revealing how Joe and Serena's journey in Paradise ended as well as well as if they're engaged now.]
Serena, who dumped Matt James on The Bachelor's 25th season, said it's rare for her to want to be around someone all the time but she really enjoyed being around the former grocery-store owner from Chicago, IL.
But since Joe's ex, Kendall Long, was constantly around watching them, Serena admitted the vibe in Paradise was "uncomfortable" and she was risking getting her heart broken by Joe.
As Joe and Serena got to know each other better on the beach, Kendall -- clearly trying to move on from her January 2020 breakup from Joe after almost two years together -- gave her attention to Ivan Hall, who competed for Clare Crawley and Tayshia Adams on The Bachelorette's sixteenth season last year.
Ivan seemed into Kendall, but she couldn't help staring at Joe and Serena and focusing on the past and what she had lost.
Kendall and Joe apparently only broke up because Kendall could never see herself moving from Los Angeles to Chicago, and Kendall even admitted the pair was still in love when they called it quits.
Kendall -- who initially appeared on Arie Luyendyk Jr.'s season of The Bachelor -- had trouble shutting off her history with Joe and acknowledged she felt extremely vulnerable and bothered in Paradise.
One evening, Joe surprised Serena with a blanket on the beach covered in lit candles and rose petals. Joe felt like their relationship was "real and comfortable," and he considered Serena to be his girlfriend by that point.
After some playful and flirtatious banter on the blanket, Serena shared with Joe, "I'm falling in love with you."
"I think I'm falling in love with you," Joe replied.
Serena was "giddy" about her romance with Joe, but Kendall was starting to fall apart.
As Joe and Serena kissed in each other's arms and danced on the beach while embracing, Kendall felt upset and "stressed out."
It hurt Kendall too much, apparently, to watch Joe fall in love with someone else on the same beach where they had fallen in love before on Bachelor in Paradise's fifth season.
"I just feel really detached from everyone... I just don't know how much longer I can do this, for Joe to be thriving and him seeing that I'm not. I'm just painfully vulnerable and I never used to be," Kendall lamented.
When Kendall sat down with Joe to discuss her lingering feelings, he confessed that he truly thought it was "over" between them.
Joe said his relationship with Kendall was "real" and it "worked," but he told the cameras, "If she really wanted me back, she should have told me before I got here and before I started this. Because I really, really loved her."
Joe, who was seriously invested in Serena and their budding romance, therefore let a devastated Kendall go.
"This is just, like, devastating. It really is. Joe is my person, like, I need a second," Kendall said in her final words, bawling her eyes out.
"I was in a real relationship with Joe and I came back where it all started, and what that did to me, I just feel absolutely broken. This is the hardest thing I've ever been through and it just keeps going. I've never experienced anything like this."