Speaking to the Herald Sun, the 50 year old actor admitted he was at his lowest whilst filming overseas in the months that followed his relationship breakdown.
'I had a little period in the middle of 2015 where I was staggering across busy streets in Berlin where I thought, "If I get knocked down by a car, that will be an easy way out,"' he confessed.
'I wasn't wanting that but I think probably like Jeff Buckley when he went swimming in Wolf River that time, "If a current takes me down then so be it."'
Thankfully, the Australian actor was able to get himself back on trach, crediting music for helping to set him on the road to recovery.
I was literally sitting there for hours at night, drinking, playing chords over and over and crying and crying — it was really pathetic,' he said.
Guy is now in a relationship with actress Carice van Houten, who he met while filming Western film Brimstone in late 2015.
The couple welcomed their son, Monte in August 2016.