'Bachelorette' JoJo Fletcher Breaks Down After 'Completely Shocking' Exit: 'I Miss Him Already' -- Watch the C

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Breaking hearts is a tough business.

Bachelorette JoJo Fletcher is in tears during a preview of tonight's episode after sending someone home leads her to doubt her decision.

"What if that was a mistake," the 25-year-old wonders. "That scares me ... I miss him already."

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A source tells ET tonight's exit is "completely shocking," adding, "You can tell this guy didn't see it coming."

The waterworks are nothing new for JoJo, who admitted to ET at the "Men Tell All" taping in Los Angeles last week that being the Bachelorette can be very difficult for her.

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"I am emotional," she shared. "It's hard. No one will understand it…saying goodbye is so hard."

"You know what is funny too -- when people are like, 'I don't see any tears,' and I'm like, 'Are you kidding me?'" she added. "You can thank my makeup artist then, because she did a real good job touching it up!"

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Well judging from the above clip, we'll send our regards in advance for the makeup artists tonight!

Watch the video below for more from JoJo.

The Bachelorette airs Mondays at 8 p.m. ET/PT on ABC.