'The Bachelor': Colton Underwood Dips, Questions If He's Made 'The Greatest Mistake of My Life'

Demi surprisingly wasn't part of the drama this week, but that's all about to change, judging by the promo for next Monday. 

There's Colton getting steamy with Hannah G., him crying about making the "greatest mistake of my life" and good ol' Demi getting feisty. 

"Looks like I'll be fighting someone tomorrow," she promises. Can't. Wait. 

Colton needs "some time alone" -- and can you blame him? 

The Bachelor storms off, and everyone freaks out. "Another part of me is wondering, what if he's about to call it quits?" Caelynn asks. 

"I'm over it," he angrily says on the beach. 

To be continued... 

"You are a liar, Nicole! You are a liar!" Onyeka yells at the cocktail party, as Nicole cry-screams back. 

The pair's bickering is so uncomfortable that even the other women -- and Colton -- can't help but get uncomfortable. 

Colton then walks over to listen to their "conversation." "I just came over here because I heard you guys yelling," he says.

Tattletale Colton goes straight to Onyeka to tell her what Nicole said about her. 

"I've never in my life been called a bully. Nicole's literally a psycho," she tells the camera. 

To Colton, however, Onyeka defends herself nicely: "She's not a good person. I don't trust her intentions, and I know you can do so much better." 

OUCH! 

"I came here for the possibility of love... I don't want a boyfriend. I don't want an Instagram husband," Nicole tells Colton at the cocktail party, on the verge of tears.

We were confused as to why Nicole doesn't want an Instagram husband, but then she decided to drop other bombshells, like that Onyeka has been bullying her since they first met on night one.

"It seriously makes my stomach upset," Colton says. 

Are we already at fantasy suites? Somehow Cassie and Colton end up in bed on their one-on-one. 

"He told me that he was crazy about me," Cassie beams. "He definitely shows me that he cares a lot about me. I don't want to come back to reality!" 

"Cassie is amazing. My gut and my heart is telling me to go all in," Colton reveals. 

Colton put his sexuality out there by revealing he's a virgin, so Cassie reciprocated by revealing that she's not one!

"It's kind of a scary thing, just thinking about different members of my extended family and my community who don't know that I'm not a virgin. They might judge me for it, and so then, I don't know, it might be some tough conversations going back home, or maybe some judgment back home," she shares. "And that's not easy." 

Colton and Cassie definitely figured out how to spend their time: kissing in the ocean. 

"I am insanely attracted to Cassie," Colton confesses, as she marvels at how great the date is going. 

Is being stranded on an island with Colton a dream or a nightmare? Cassie's clearly feeling it, but we can't help but notice there's literally NOTHING ELSE ON THIS "ISLAND" besides the camera crew. 

Neither Nicole nor Onyeka! It's Hannah B. who gets the group date rose, because a love confession is far less stressful than a back-and-forth over comments that may or may not have been said! 

"I think this rose is his way of saying 'Thank you so much, I appreciate it,'" Hannah B. gushes to the camera, as Nicole is still crying over her drama with Onyeka. 

The drama with these women! Just when we thought we were over the beauty queen drama, Onyeka starts some sh*t with Nicole, telling Colton that Elyse told her that Nicole was trying to "find an opportunity to leave Miami." 

Colton freaks out and confronts Nicole, as Tayshia tells Onyeka that that Nicole never even said that comment. 

"I feel really personally affected," Nicole says after rejoining the group, bursting into tears. 

After all that drama with Caelynn, Hannah B. might just be back as a season frontrunner. 

"I am falling in love with you," Hannah B. confesses, as Colton says nothing and kisses her. 

Just a mid-episode thought: Kirpa has a Band-Aid on her chin. Why? 

Demi, Hannah G. and Hannah B. nope out of the survival challenge, heading to a hotel to pick up some fine dining instead of the jungle's natural protein. 

"These other ladies can suck maggots, but me, I'm drinking champagne," Demi teases while popping open a bottle of bubbly. 

Nothing heals a broken heart like a jungle adventure group date! 

"Hannah B. swallowed a bug whole. Nicole stuck her hand into a hole with an eel in it. And Tayshia let a scorpion crawl all over it," Colton says. "These women are getting after it." 

After Heather returns from her one-on-one date, Elyse heads off to see Colton in his hotel room, dressed like she's going to the Oscars. 

"I struggled a lot, because I want to know all the silly stupid things about you and how... I want the time and attention that a relationship deserves," Elyse tearfully tells him. "F**k, you're breaking my heart." 

"I can't accept a proposal after a few months of sharing your time and attention with other people. I can't do it," she continues. "You want something that I can't promise. ...I listen to these girls talk about how much they're falling in love with you. This isn't working for me. I have to leave."

So, Heather's had a boyfriend before, and it lasted EIGHT MONTHS WITH NO KISSING. 

"I do have a concern with it," Colton says, but ultimately decides to give her the rose, and takes her off for a private walk to watch some fireworks.

"This is amazing," he says, before going in for the kiss full on makeout. 

"It was so good. It literally just felt so natural!" she gushes to the camera. "I hoped that there would be butterflies and excitement and fireworks, and literally there was fireworks."  

The next date card arrives, and it's Cassie who will get the week's next one-on-one, much to the chagrin of Elyse. 

"It sucks," Elyse tells the camera, on the verge of tears. 

Heather clearly can't wait to kiss Colton, but do we really need all those closeups of him eating pasta? 

Either way, Heather is feeling "pretty special" on their date, as they sit in silence, marveling at how "unbelievable" their surrounds are. 

The women are loving Thailand, but Elyse... not so much. The 31-year-old makeup artist can't help but express her doubts about where she and Colton are going, after seeing him form connections with other women following their one-on-one date in San Diego weeks earlier. 

Never-been-kissed Heather finally gets some alone time with our Bachelor -- and she's looking lose her lip virginity.

"If there was ever a time I was going to kiss someone, this is the setting!" she says as they head off on a romantic boat ride. 

Surprise! We're in Thailand, and Colton's taking a shirtless shower to let us know that we're in for some sexiness!