A pyromaniac is someone who loves fire or fires,just as someone else might like football.They like to burn things.

A person who likes to burn or blow things up

One who enjoys all that fire has to offer. Could be artists or maniacs.

A person who absolutely loves fire. The smell of gas or smoke sends them into ecstasy. Lighting a candle and blowing it out and relighting it and blowing it out repeatedly, watching the smoke lightly twirl around in the air, is a good sign of an pyro. Many pyros can figure out different types of gas and/or what's being burnt just from the smell. Watching a flame on a lighter flickering is fun and addicting, but watching a full piece of paper burn all the way to the bottom is complete elation. Pyromaniacs are difficult people to understand and are often confused with arsonists. Pyromaniacs know how fire works, can predict in which direction it will burn, how much smoke the fuel will make, how quickly an object will burn, what the burning object will smell like even before it is being burnt, knows how to mix chemicals to make cool flames (like boric acid with alcohol for a green flame) and other crazy cool things. An 11 year old kid who wants to be bad ass in front of his friends and owns a lighter and makes what he calls "fireworks" (i.e. match rockets, penny bombs, etc.) is NOT a pyromaniac, just a fag.

one who just likes fire, and has no reason for burning things. pyromania is a mental illness. people who burn things to prove a point or protest are most likely not pyromaniacs.
shortened: pyro

A person that loves fire will set things on fire or them selves just for the love of fire

To love fire so much you do rash decisions with it, it can let of emotions.