This is only the beginning, but the second part can be used pretty much the whole song.  Had to get this on, 'cuz there are no other I'm Sorry I'm Leaving tabs for those STD fans like me.

|--0--0-0--0--0-0--0--0-0--0--0-0--|--0--0-0--0--0-0--0--0-0--0--0-0--| 2X
|--0--0-0--0--0-0--0--0-0--0--0-0--|--0--0-0--0--0-0--0--0-0--0--0-0--|
|--8--8-8--8--8-8--8--8-8--8--8-8--|--8--8-8--8--8-8--8--8-8--8--8-8--|
|--9--9-9--9--9-9--9--9-9--9--9-9--|--9--9-9--9--9-9--9--9-9--9--9-9--|
|--9--9-9--9--9-9--9--9-9--9--9-9--|--9--9-9--9--9-9--9--9-9--9--9-9--|
|--7--7-7--7--7-7--7--7-7--7--7-7--|--9--9-9--9--9-9--9--9-9--9--9-9--|

|---------------------------------------------------------------------| 4X
|---------------------------------------------------------------------|
|------------------------------------------------8-------------8------|
|------9-------9---9------9-------9---9------9-----9-------9-----9----|
|----9---9---9---9------9---9---9---9------9---9-----9---9---9-----9--|
|--7-------7----------9-------9----------0-------------0--------------|

lyrics:

your middle finger was clutching my thumb
through the park and over mcdougal
the torches were blazing above our street
and just down from the sky
casey stepped with anna off the curb
his shoes are clogs
did you see? did you see?
dipped in that puddle
the one catching green
they were tripping up slipping around
singing "rosie" and oh oh oh
wanted to pull you down
roll on top of me baby
yeah just roll roll roll
we'll wreck our clothes
we'll scrape our knees
we'll taste the scabs
you, sweet, are worth these next four months
until i bail out and kiss behind your ears
drive off in the van
oh my god i think im dying in this car seat
where ill spend through winter
(what can you do) i dont know if i could go
(what can you do) i dont know, not through with you
(what can you do) i dont know if i could go
(what can you do) i dont know, im not through with you
okay