Gajeel's sitting at a barstool in the Fairy Tail guild. The topic on his mind right now is unusually deep; it is magic personification. Or, more accurately, Dragon Slayer Magic personification.
Certainly, Salamander is very much like a dandy little flame, warming the hearts of those he cares about, spreading his warmth wherever he goes. And of course, that same 'dandy little flame' could suddenly erupt. Violently. Resulting in the terrific ass-kicking of whatever enemy was in sight.
And then, there is the blue haired Dragon Slayer… Grandine or Wendine…no, Wendy… no, it's Grandy! Yeah, Grandy is like her magic, she's like a nice cool wind blowing away impurities from tainted hearts and tainted minds. That very same wind could blow with staggering force, it could form hurricanes and create tornadoes, but it doesn't. That doesn't matter to Gajeel.
Lastly, he thinks about himself. He doesn't think iron fits him. While flame is hot and warm, and wind is cool and refreshing, iron is cold and unfeeling. Iron is used to kill, like in Titania's swords. Iron has no feelings. Gajeel does. Even if the ones he shows more often are a desire to fight and a snobbish attitude.
For all his shooby-dooby-dooba's Gajeel's just a lonely man who wants to make friends but doesn't know how.
By now, Levy is so drunk, she's tripping over her own feet. Well, time to take her home, then.
He's depressed. He doesn't want to go on with no friends forever. Maybe he'll have to. Well, he's going to bear it with a heart of iron.