"I think it's weird reliving it and watching it -- it wasn't pretty all the time and it doesn't get very pretty at later stages," Zach, 26, teased of what's to come on Season 27 in an interview withPeople.
"But all in all, call it cliche, but I truly do believe everything did happen for a reason."
Zach continued of his The Bachelor ending, "It couldn't be perfect to get to where it's at in the end -- and it may or may not have made it better or stronger at the end. But I do feel confident. Very confident, yes, absolutely. I've got a big grin on my face."
The Bachelor's 27th season will feature Zach visiting his Final 4 bachelorettes' hometowns on Monday, March 13 at 8PM ET/PT, and then The Women Tell All special will air the following night on ABC.
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Zach said he's "not a big fan of public speaking" but he viewed The Women Tell All as a "great opportunity" to give the bachelorettes and himself some closure.
"I think my heart was beating through my throat like when I was just seeing everyone because it's been literally since doing the show since I've seen them," Zach shared.
"I have no other remark other than it was just kind of like those nerves of, like, night one coming again."
Zach suggested it was a lot to have all of these beautiful women "staring" at him.
"[They] may or may not like me. Honestly, it was a cool experience, though to get to see them again," Zach noted.
While the next two episodes will certainly have their fair share of drama, Zach teased that the Fantasy Suites are what fans need to brace themselves for.
"I'll just say after Women Tell All, overnight week -- Fantasy Suite week -- it gets, I don't want to use the word 'juicy,' but it gets... juicy," Zach teased during his recent "Bachelor Happy Hour" appearance.
"It does not necessarily go the way, I think, we all thought it would."
Zach went on to admit, "That's the one [episode] I'm nervous about. Mom, don't watch."
Based on a preview of Zach's overnight dates that aired at the end of The Bachelor's March 6 episode, it appears the cast filmed Fantasy-Suite week in Thailand.
"This week is viewed as 'sex week,'" Zach says in the preview clip.
Zach proceeds to tell The Bachelor host Jesse Palmer, "I know it's not conventional, but no sex."
But then Zach admits, "I really f-cked it up."
In a different preview that aired last month, Zach explains to the cameras, "This was a moment of love, not lust. I could lose one of the women from this."
Zach concludes in a teary-eyed confessional, "That was a beautiful moment. It feels robbed."
But as Zach mentioned, his journey to find love apparently ends happily. He even told Becca Kufrin and Michelle Young, "I am excited for the end of it, for selfish reasons, to kind of start my life with someone. Tune in. I'm excited for that phase of life."