Keira Maguire also wrote: 'Omg... Congratulations you beautiful soul.'
Congratulations my brother!! I'll crack a bottle when I see you next. So happy for you both,’ wrote Sam Cochrane.
Haibon remained relatively low key on the Channel 10 show, leaving the island early.
In other news BIP star Keira Maguire has confirmed that she and beau Jarrod Woodgate have indeed called it quits.
The news was confirmed during an Instagram Q&A session when a fan asked whether the pair were still an item. Keira responded with, 'No we are not.'
The reality TV sweethearts unfollowed each other on Instagram in June, sparking whispers they had split.
Neither Keira or Jarrod - who have never been shy about sharing shots of their PDAs - have posted pictures together since the end of April.
Keira even celebrated a birthday on May 27, but there were no comments from Jarrod on her birthday post.
The couple, who fell in love after meeting in Fiji on Bachelor in Paradise in 2017, have had a rocky ride since the start.
WATCH: Keira Maguire pokes fun at this season's cast... LOL