Calvert was not shy about showing off his new girlfriend Kristen Blake over Instagram.
He captioned a photo of the two, "When true love comes together."
The post continued, "Finally a woman that understands ur job and ur child. After 6 years apart s**t finally feels right. And it's amazing."
Calvert has since deleted the post.
The MTV star has since posted a photo of the words "I love you" written in sand, captioning: "Three words that are way too loosely used now days and so easy to say to people."
The sudden split comes after his on-again, off-again relationship with ex-fiancee Brooke Wehr.
Wehr called off their engagement in February when she accused him of cheating on her. They got back together a short time later, but eventually called it quits for good.
Calvert was married to Messer from 2012 to 2015. They share 4-year-old daughter Adalynn.
This article originally appeared on New Idea.