"I think a lot of people were curious about his decisions. [And] listen, you always can handle things better," Nick toldEntertainment Tonight.
"Arie risked a lot to do what he did, and he didn't gain any fans from it, so hopefully [it was the right decision]. I just hope it works out."
Arie proposed marriage to Becca Kufrin when The Bachelor's Season 22 finale taped late last year, only to dump her a couple of months later because he felt his heart still belonged to the runner-up, Lauren.
The pro racing driver reconciled with Lauren days after breaking up with Becca on-camera, and then Arie and Lauren got engaged March 6 on The Bachelor: After the Final Rose.
"I think a lot of people were confused, but I think more importantly Becca handled herself really well. I think everyone's really rooting for her now, so I think that's what's really important," Nick shared. "I think [Arie and Lauren] will work out."
Nick at least thought Arie's The Bachelor season was "entertaining" and "fun to watch," and the Season 21 star can sympathize with the "very difficult position" Arie was in.
But now that everyone has moved on from the drama, Nick said he's looking forward to watching Becca's season of The Bachelorette, which premieres May 28 on ABC.
"She's going to be great," Nick noted of the Minnesota publicist, who's currently filming Season 14.
As for Nick, however, he said his "time as a cast member on the show is done." Before starring on the franchise, Nick competed on two separate editions of The Bachelorette and then also looked for love on Bachelor in Paradise 3.
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So while Nick is enjoying -- or at least tolerating -- the single life, he's focusing on new career aspirations, which involve still being on-camera in some capacity.
"My acting career has gotten off to a good start. I've always been told, 'You have to be patient,' but I've been really lucky. I got to do a quick cameo on Family Guy and I did a guest star role on Teachers recently," Nick said.
"I'm working really hard, taking it very seriously, and I'm very lucky to have a lot of people giving me really good advice and looking out for me. So I'm thankful and we'll see how it goes. But I'm working hard."
When asked whether being a part ofThe Bachelor franchise helped or hurt his budding acting career, Nick replied, "It does both."
"Certainly being a part of The Bachelor world gives you a platform, and it opens some doors, but at the same time, I think you have to break some doors down in terms of getting your credibility," Nick explained to ET.
"I don't want anyone to assume I'm taking it for granted or assume that anything's owed to me. Because I think a lot of people are probably thinking, 'What are you doing?' I kind of get that, and I'm honest with myself that I'm sure I have some critics."
Nick said, overall, he's thankful people in the industry have given him a chance as well as "the opportunity to show them what I can do."