The former reality star and navy diver began dating in 2017.
Forst told The Daily Telegraph at the time, "I feel really blessed to have a friendship that has turned into something more. It's nice to be able to share [my career success] with him."
Last year, in a candid essay titled Toxic Relationships, Frost penned an honest insight to what it’s like when “partners, friends, bosses or colleagues...emotionally and verbally abuse you without you even realising.”
On her own experience inside a toxic relationship, the Home and Away actor said she was blind to the damage her partner (believed to be Mielczarek) was causing because she perceived her ex to be her soulmate.
“...I know how difficult toxic relationships are because I was in a psychologically abusive relationship for 18 months. Eighteen months! I had no idea. I thought I was madly in love and had finally found my soul mate. It wasn’t until I started seeing a psychologist that I became aware of something being seriously wrong.”
Adding, that her ex-boyfriend was in denial about his vilifying behaviour.
“He repeatably told me I needed “serious help” and… Some of his favourite lines were, “You’re lucky to be with me. No-one else would put up with you,” and, “If you break up with me, you’re just going to ruin the next relationship and the relationship after that. Do you know how embarrassing that will be?”