Blac Chyna Left Questioning Rob Kardashian Relationship After He Bails on Her: 'I Just Don't Have Time for That'

Blac Chyna and Rob Kardashian relationship was seriously strained on Sunday’s episode of Rob & Chyna.

The episode opened with Chyna, 28, throwing a birthday party for one of her friend’s at her house – but notably missing from the celebration was her fiancé Kardashian, 29.

“I miss Rob. We haven’t spoken in four days,” confessed Chyna. “He really thinks I don’t want to be with him. I do want to be with him, I just want him to get himself together.”

Chyna voiced her concerns about the relationship, admitting that she thinks Kardashian’s insecurities were impeding him from living a regular life – which was making her question whether he’ll be able to take care of his family when the couple welcomes a daughter later this year.

Meanwhile, Kardashian, had been spending time with sister Kourtney‘s ex Scott Disick.

Opening up about the tension with Chyna, Kardashian revealed the two are just “different people.” Kardashian also confessed to having trust issues because one of his exes was previously unfaithful to him.

“When you’re in a relationship, you can’t just accuse people … That’s not fair,” he said. “We love each other and nothing bad is going on, so as a man I have to just be more secure and realize this girl isn’t like my last.”

Finally, Kardashian gave in to Disick and his mother Kris Jenner‘s urges and reached out to Chyna. He explained his insecurities about his weight were making him fear she would no longer be attracted to him, something that wasn’t easy for Chyna to hear.

“When Rob says really bad stuff about himself, it throws me off a lot because I don’t see it,” Chyna said. “Some of the stuff he thinks and says is really sad.”

The couple agreed to meet up in person to talk things over. Kardashian apologized for his behavior, but insisted that he shouldn’t move back in just yet because he still needed time to work on himself. Instead, he promised to make it up to her by joining her on her scheduled press trip to Cannes.

In the days leading up to the trip, Disick took it upon himself to become Kardashian’s “life coach,” springing surprise workout sessions on him and regularly calling him up to check on him. Things seem to be going relatively well until a styling session forced Kardashian to confront the fact that he’s unhappy with his weight.

“I do not want to go to Cannes anyways,” he said. “Even when I was in the best shape of my entire life, I still had an insecurity with my weight.”

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Chyna, meanwhile, was dealing with her own insecurities after stumbling across tabloid rumors about her “a– collapsing.”

“The last thing that I need is people on the internet bashing me, especially when I’m pregnant and I’m about to make a big public appearance in front of the media,” she said. “I need my confidence. It’s not cool.”

One thing was keeping her going, though: the expectation that her fiancé would be right by her side: “It’s such a relief that Rob is coming,” she said. “I feel like the trip will be a perfect time for us to have some alone time and figure out our plans.”

Unfortunately, Kardashian just wasn’t feeling up for it.

“I mean, I really wanted to originally but I’m just like, not all the way there to be going,” he told Chyna. “I just don’t think I’m really comfortable or ready to be doing that.”

Chyna was furious, screaming at him for bailing on her last minute and calling his behavior “f—ing whack.”

Chyna ended up heading to Cannes alone – and Disick decided he needed to take his life coaching to a whole new level, secretly setting up a full-blown surveillance system in Kardashian’s home.

“Rob is very quick to just say ‘Yes, yes, yes’ whenever you ask him anything and I don’t honestly always trust when he’s telling me the truth,” said Disick. “I feel like I need to monitor him.”

When he found out, Kardashian was fuming: “Scott is definitely going way too overboard,” he said. “I’m 29 and I’m not one of his kids.”

“Scott has really good intentions with me, but I don’t need him like that,” he continued. “He needs to understand that I’m going to get right for my baby on my own and he can’t tell me what to do.”

Indeed, while Chyna was away, Kardashian threw all of his effort into preparing for their daughter, working hard to set up the baby’s room and hitting the treadmill.

“Taking charge of your life means you need to be proactive,” he said. “The baby motivates me the most – Chyna is right there with the baby. I’m trying to do everything I can before this baby gets here to be a good dad. I definitely do want to get right and I know I will. It’s just going to take a little bit of time.”

Upon returning from her trip, Chyna was still disapppointed with Kardashian.

“Rob shouldn’t use these insecurities about his weight as an excuse,” she told her friend. “This is another thing that makes me question everything. This is just irresponsible. I just don’t have time for that.”

Her friend advised her to be more patient and understanding of him, and Chyna decided to stop by his house.

“I wanted to come over here because of all the fighting and the beefing – I just want to come to some type of common ground with us and the relationship,” she told him. “I can understand why you feel insecure about your body and stuff. Maybe I need to be more supportive of that and not be so hard on you. I’m sorry for being rude.”

“I’m not worried about nothing in regards to you,” Kardashians said. “I just need to get my s— together.”

Finally, the two kissed and made up – and Chyna was over the moon when she saw all the work Kardashian had done for the baby’s room.

“The fact that Rob actually went out and bought baby stuff was like the sweetest thing,” she gushed. “To set it up in the house really shows me that he’s willing an committed to me and the baby.”

Rob & Chyna airs Sundays (9 p.m. ET) on E!