The couple announced the break-up today in separate posts on their Instagram pages.
Agnew said the six month’s since filming ended had been a “very unique experience” but said their relationship didn’t “translate” into the outside world.
“Chels and I have made some beautiful memories together that I’ll always cherish, and I wish her nothing but the absolute best,” he wrote.
“However, it’s with a heavy heart that I write this. For Chels and me, our relationship hasn’t translated from filming to the real, every day world as we had hoped.”
He described McLeod as a “very special woman” and hoped she would find the “happiness she deserves”.
The astrophysicist added that there was no other romantic interest in his life at the moment.
“For those who may wonder if there’s someone else for me right now, there absolutely is not,” he said.
“It’s no one’s fault, it’s just life.”
McLeod took to her own Instagram to share multiple pictures of her and Agnew throughout the show while also thanking everyone for their “support and kind words”.
She said it has been an “incredibly exciting, rewarding, challenging, and emotional journey”.
“Matt showed me what it was like to be respected in a relationship and I am so thankful for that,” McLeod said.
“However, it saddens me to say that we are no longer together. I wish him nothing but the best. I’m sorry to those that were invested in our relationship.”
She reminded her followers to be kind to others online as they “don’t know what is going on behind the screen”.
Their split comes six months after the finale was filmed and just two months after they went public with their relationship.