The couple – who were together for five years – were living together and discussing wedding plans when British-born Steve was given a devastating testicular cancer diagnosis at the age of 44.
The reality star – Steve has also appeared on First Dates – credits “deadest sweetheart” Diana for getting him through his cancer treatment.
“I was just overcome with shock about being diagnosed with testicular cancer. She was there. She supported me at every oncology appointment that I had, the operation, all this sort of stuff. She's just an absolute deadset sweetheart,” he told the publication.
However, despite their strong bond, the couple’s relationship eventually fizzled out.
“For the relationship that I was in, it was a five-year relationship, we were engaged to get married. Obviously, that fell apart for other reasons, but she was super supportive towards me, and I will be forever grateful because of that,” Steve told Talking Married host Shelly Horton.
Earlier this week, MAFS watched as Steve made the awkward confession to Mishel’s daughter that he had cheated on a partner in the past.
"Steve seems nice but he did drop a bombshell saying that he had cheated," she explained to producers of her decision to tell her mum about the confession.
"My mum’s been cheated on; cheating’s definitely a dealbreaker. I’m definitely worried about her getting hurt and mistreated by Steve."