"
a liar,
I've never made a bet,
But we gamble in desire,
I've never lit a match,
With
"I've never lit a match with intent to start a fire" he's never done something with intent to make it a huge deal.
"But recently the flames are getting out of control" it basically means what it says, this flame is out of control, he doesn't know how to deal with all this pressure and its getting harder to handle so it gets bigger and bigger until it runs out of fuel to burn.