Liam makes the shock decision in an upcoming episode as he realises that he cannot live with the fact that Bianca (Lisa Gormley) is carrying Heath Braxton's (Dan Ewing) child.
The newlyweds are planning to leave Summer Bay to escape the complicated situation, but Liam feels compelled to give up on Bianca altogether when he realises that she does not want to go.
Axle Whitehead, who plays Liam, told TV Week: "He's not particularly happy. It's just been such a tough time, what with Heath and the whole town knowing.
"[Bianca] leaves work and is saying goodbye to April and it's sort of in that moment where Liam can see that underneath she doesn't really want to go. She has a lot more at stake in Summer Bay than Liam does."
Revealing what it was like to film the emotional scenes, Whitehead added: "It was a heavy time and a big moment. You draw on your own experiences - and I've been through my fair share of rocky break-ups!"
Home and Away airs these scenes next week on Network Seven in Australia and late May on Channel 5 in the UK.