Tana caught wind of her exes emotional post, commenting, "omg".
Bella's tears came after her initial response, which was sharing a raunchy throwback photo for Tana's 21 birthday of the pair being intimate on a yacht, proving she still loves her.
The 21-year-old captioned the loving post with: “Through thick and thin 😭🤧 I love you Tana happy bday you beautiful beautiful special girl.”
Thorne and Mongeaus originally split back in February after just over a year together.
They ended things on a positive note but never really went into detail on what caused the breakup as Bella called for privacy at the time.
Mongeau although reassured fans that they still cared for each other as she tweeted: “i love her forever don’t get that twisted. she changed my life forever. don’t rly wanna talk on it.”
Hours earlier Tana made the announcement that she was engaged to controversial YouTube star Jake Paul while in Las Vegas for her birthday and took to social media to share the happy news.
See the official announcement video below:
Fans are although struggling to believe the news is real as many have labelled it fake news.
The YouTuber although responded to one Twitter user that she is, in fact, telling the truth. Tana answered "it's not. i'm engaged. holy f--k."