"I can say I followed my heart the entire time," he told ET's Lauren Zima last Wednesday. "This was the hardest experience of my entire life. I'm still so grateful for it and I really would do it again. I promise you I would."
"I know right now it's like a lot of stuff going on, but I totally would [do it again], and I can say I'm happy," he added.
The teaser for Weber's ending shows him interrupted by host Chris Harrison as he prepares to hand out his final rose. Harrison informs him that there's "something you should know," with Weber subsequently declaring he feels like he's going to pass out.
"That was a really tough moment for me. That was brutal and that was the last thing I needed to hear in that moment. Absolute last," Weber told ET. "I'd been through so much up to that point and just praying, 'Let's just have a smooth ending here,' and it was tough."
The promo also features a shot of Weber's mom, Barbara, tearfully begging him not to "let her go." Weber wouldn't reveal which woman Barbara is referring to in the emotional moment -- but said it affected him a lot.
"I am very, very close with my family and I value their opinion," he explained.
Fans have speculated that Weber -- who has boasted about his ending remaining spoiler-free -- hasn't yet handed out his final rose and that he'll make his choice on the live finale next month. When asked if viewers will see a situation like former Bachelor Arie Luyendyk Jr. or Bachelorette Hannah Brown, in which their After the Final Rose revealed big changes for their relationship status, Weber told ET his finale will be "very unique."