Although Amanda, 28, and Bobby, 33, recently moved in together in a Laguna Beach home with a beautiful ocean view, they are apparently moving on without each other.
"There was no cheating," Bobby wrote to a fan Friday on Instagram.
Rumors of the pair's breakup began to swirl on April 2 when fans noticed Amanda and Bobby had stopped following each other on Instagram.
One fan therefore decided to reach out to Bobby for answers.
"I just can't understand how y'all can go from being soulmates, talks of getting engaged soon, you being a father figure, buying a house together, to suddenly broken up and deleting all pics of her from your page," the person commented on Bobby's latest Instagram photo on March 29.
"I don't get it! She must have cheated! Or you did. If not, WORK IT OUT, For your sake and for the sake of those girls! You are no doubt breaking their little hearts!!... Don't just give up."
Bobby insisted in reply, "I'd always be there for the girls and I've voiced that many a time. Coming from having a deadbeat Dad I've chosen to live my life nothing like him. They touched my heart and vice versa. No matter what I'll always be around for them."
When another Instagram user asked Bobby if he left Amanda over the recent hacker scandal in which a man allegedly obtained topless photos of her from her doctor's office and has been blackmailing the reality TV star, Bobby said, "Not at all."
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Amanda and Bobby's breakup seems very sudden considering her representative just told Us Weekly earlier this week Amanda was receiving support from her then-boyfriend following the incident.
"The hacker acquired photos from Stanton's doctor following her past breast augmentation; hacking the doctor's database and threatening to release all of the images to Stanton's followers unless Stanton agreed to pay an exorbitant amount of money," the representative told Us.
"To combat the attack, Stanton began unfollowing some of her Instagram followers in an attempt to keep the images from being released. Unfortunately, the hacker has since sent the images to a number of Stanton's followers including past boyfriends, ABC producers, and more."
The representative added, "Authorities are involved as this is an ongoing investigation. With the support of her family and loved ones including boyfriend Bobby Jacobs, Stanton wishes to deal with this matter privately moving forward due to the vicious nature of the individual responsible for her harassment."
It appears Amanda needed Bobby more than ever this week, especially since she admitted in a Tuesday Instagram post her anxiety and stress levels were "out of control" and she has lost sleep and motivation.
Amanda has yet to comment on her split from Bobby except for posting a photo of herself with her two daughters on Friday.
"This photo just makes me too happy. Had to post," she captioned the sweet image.
Amanda, who competed for Ben Higgins on The Bachelor's 20th season before appearing on two different seasons of Bachelor in Paradise, met Bobby on Instagram and went public with their relationship in May 2018.
Amanda expressed to Us earlier this month how Bobby was "a father figure" for her girls, Kinsley, 7, and Charlie, 5, and she hoped to "get married and have another baby" with him in the near future.
The timeline of events leads fans to believe there was an explosive fight or some type of dramatic scenario that ended their romance.
Prior to getting involved with Bobby, Amanda had a highly-publicized breakup with her ex-fiance Josh Murray and then a short-lived relationship with Robby Hayes.