This song gets me emotional every single time I listen to it. It's so honest, and heartbroken sounding. But yeah, so pretty much, he lives in a town that's not going to get him where he wants to be. That town isn't doing anything for him, and the people aren't treating him well (at least not some of them), so he has to smoke to get away from it. He feels trapped, but he just wants to leave, and get out, to start the life that he wants to live.
This song gets me emotional every single time I listen to it. It's so honest, and heartbroken sounding. But yeah, so pretty much, he lives in a town that's not going to get him where he wants to be. That town isn't doing anything for him, and the people aren't treating him well (at least not some of them), so he has to smoke to get away from it. He feels trapped, but he just wants to leave, and get out, to start the life that he wants to live.
That's what I think he's saying anyway.