Lyric discussion by kates_x3 

Cover art for L.G. FUAD lyrics by Motion City Soundtrack

it is genuinely surprising how wrong some of these people are getting the meaning of this song. going into long winded spiels about how this word means this and that word means that and it could be interpreted as this or that. but it is pretty obvious what he means, the lyrics are pretty straight forward. I am not trying to be antagonistic I am just shocked.

I think the general idea is that even though he misses being innocent of substance abuse he still chooses to "get fucked up" meaning get trashed/smashed/wasted. not necessarily as a "coping mechanism" but simply because he wants to get crunk and that is how he has fun now. for a lot of people once you start it is hard to have fun otherwise, but because of the increased danger of getting fucked up, etc, you lose a part of yourself (your consciousness at least) but ultimately choose that path anyways.