"End of the chapter but not the end of the romance novel," Jacob began, referencing his Night 1 entrance when he rode up to The Bachelor mansion shirtless and on a white horse.
"After watching yourself you realize so much of how you need to realign your approach. For me this experience was extremely testing mentally and emotionally."
Jacob has been accused of being insensitive and harsh after he was shown telling Gabby on the latest episode, "I don't know if maybe we've had the connection that I think I wanted... Even if, say, you were the only person here, I don't think I could have the heart to continue. Because at the end of the day, we're trying to find somebody for the rest of our f-cking lives... But obviously you're smoking."
Jacob acknowledged in his Instagram post how he used "some choice wording" when telling Gabby, whom he deemed "a beautiful woman," that he only wanted to pursue a relationship with Rachel Recchia going forward.
"I want to take this moment to apologize to @gabby.windey for not taking into consideration her feelings," Jacob continued.
"What I said was ignorant and not appropriate for the moment. I realized you don't know what someone could be going through or where their headspace is at. Listening instead of explaining would have gone a lot further. Personally, I wouldn't want anyone to say what I said to me."
Jacob insisted he has "no excuses" because "what was said was said."
"I can't go back on the past. I can only learn [from] this moment to understand everyone deserves to be respected," Jacob wrote. "We all make mistakes but as a man I won't take this for granted. I wish Gabby all the best in her pursuit for love. I know she'll find it."
"It was without a doubt life changing. I personally have a better understanding of how to exemplify sincerity and love whenever possible. 'A heart full of faith is better than a soul full of doubt' .. have faith," he concluded.
During a recent appearance on the "Talking It Out with Bachelor Nation" podcast, Jacob stood by his claim he would've quit the show had Gabby been the only The Bachelorette star.
He also confessed that his behavior was "rude."
"I took back what I said in a lot of ways... Watching myself say this [on the show], I'm like, 'Damn, that's so rude!' And then this girl right next to me, she kicks me really hard in the leg," Jacob revealed.
"She was like, 'Why did you say that?!' And I'm like, 'I know, why did I say that?!'"
Jacob therefore went into the unprecedented third Rose Ceremony of the season hoping to receive a rose from Rachel, but she chose to send him packing.
Rachel and Gabby ultimately eliminated Jacob, James "Meatball" Clark, Termayne Harper, and Alec Garza.
Hayden Markowitz -- who received a rose from Rachel -- has also been subjected to backlash for telling Gabby that she's "rough around the edges" while dumping her at the group-date afterparty.
"When Jacob goes, 'I'm more into Rachel and if it was just you here, I'd probably send myself home -- but you're smoking hot,' go kick dirt, Jacob! Like that is going to make Gabby feel better?!" Becca vented on the latest episode of her "Bachelor Happy Hour" podcast.
"That's not going to make any woman in that situation feel remotely better," she added. "Stop talking while you're ahead... Comment on her personality or how charismatic she is, or anything other than, 'You look great on the outside!'"
Michelle found the interaction equally upsetting and said on the podcast, "It just makes no sense... This is the man that rode in on a horse [as a] knight [on Night 1], and that's what you end with?!"
Michelle laughed and continued, "If we're going off The Notebook and all of these romantic novels, that's not a part of it -- ever. Period... [Some men] feel like [being called hot] is what we want to hear, and that's not what we want to hear."
Gabby was rejected three times, seemingly in a row, at the afterparty on Monday night'sThe Bachelorette episode, and then Rachel was rejected by three men when they decided not to accept her roses at the Rose Ceremony.
It was a tough week for the two The Bachelorette stars, but they ended up taking the power back and will have their own individual group of guys to date going forward.
Gabby now has nine bachelors left in the running for her heart while Rachel has eight men on The Bachelorette.
Meatball asked Rachel for a second chance during the closing credits of Monday night's The Bachelorette episode, but her answer will be revealed on the upcoming August 1 episode.