Lyric discussion by lactate 

Cover art for Skeleton lyrics by Front Bottoms, The

the song is about a dude who failed at a relationship. he goes out to his car - possibly because the significant other kicked him out of the house - and gets high to forget his feelings.

also, i get the sense the dude is also spying on the significant other, possibly watching her with a new boyfriend.

and he will do whatever it takes to win her back, as evident by "i got miles to go..." stanza.