You don't know what you've got til it's gone.

Kailyn Lowry is so close to her August due date — and even though she's open about coming to terms with being a single mom since daddy Chris Lopez will not be in the picture, it's making her appreciate her ex-husband Javi Marroquin.

“Right now she’s seeing how amazing Javi is more than ever before,” a source close to Kail revealed to Hollywood Life. “The way he looks after the boys and is just so involved in their lives is pretty amazing. He’s been SO supportive lately, more supportive than Chris that’s for sure. It’s got her [feeling] pretty mixed up, and of course with her hormones running extra high, all her feelings are magnified.”

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And it looks like she's slowly starting to try to get back on Javi's good side! The 25-year-old left a comment on one of Javi's recent Instagram selfies where he looked extra cute. Kail added a comment — along with hundreds of other thirsty comments from other girls — and they ended up having a short but sweet interaction with each other.

kailyn lowry javi marroquin instagram

When she announced her pregnancy back in March, fans were shocked because she had just finalized her divorce from Javi just three months before — and many of them started to speculate who could have fathered her child. She eventually revealed that her ex-boyfriend Chris Lopez is baby daddy No. 3, but she's also been posting cryptic messages that suggest that not only are they not together, but Chris isn't involved in her pregnancy at all.

“Things ended pretty badly,” an insider said. “He’s been a real a– to her, and has made it clear he doesn’t want anything to do with the baby. Kailyn’s hoping he will change his mind when the baby arrives — she doesn’t care about the financial side of things.”

https://www.instagram.com/p/BVZxhHeFOLD/

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But all of the drama with Chris has been helping Kail see what a good man and a good father Javi is compared to her ex.

"One thing this experience is doing is softening her heart a lot to Javi,” the source continued. “The difference between Chris and Javi is like night and day. No matter how bad things get between her and Javi he’s always an amazing dad.”

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Scroll through the gallery below to take a look back at Javi and Kail's relationship timeline.