Exclusive preview of '90 Day Fiance: The Other Way': Gabe is heartbroken because Monica is not attending her wedding

Things started well for Monica and Isabel, but a fight changed everything. Monica is no longer coming to Gabe and Isabel's wedding. "It's just, support me on the day I really need you to support me," Gabe says in this EXCLUSIVE preview for the May 7 episode of 90 Day Fiance: The Other Way >.

Gabe is upset that Monica is not attending this wedding. (TLC)

Gabe continues to ponder Monica's situation. Gabe's mother doesn't think he needs to worry about Monica on his wedding day. However, Gabe just can't let go. She's his sister, after all.

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"If she wants to come, she can come," Gabe tells his mother about Monica. Gabe admitted he felt like things were "too good to be true" and something was bound to go wrong.

Gabe's mom urges him to just focus on the wedding and not let any of that drama worry his big day. "I never imagined, knowing what I've been through, that my sister wouldn't be here with me on one of the most important days of my life," he says.

He continues, "It's hurtful. It's only gonna happen to me once." All Gabe wanted was to have...