I'm so happy 'cause today
I found my friends
They're in my head
I'm so ugly, that's okay
'Cause so are you
Broke our mirrors
Sunday morning is everyday
For all I care
And I'm not scared
Light my candles, in a daze
'Cause I've found God

Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah

I'm so lonely, that's ok
I shaved my head
And I'm not sad
And just maybe
I'm to blame for all I've heard
I'm not sure
I'm so excited
I can't wait to meet you there
And I don't care
I'm so horny, that's okay
My will is good

Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah

I like it I'm not gonna crack
I miss you I'm not gonna crack
I love you I'm not gonna crack
I killed you I'm not gonna crack

I like it I'm not gonna crack
I miss you I'm not gonna crack
I love you I'm not gonna crack
I killed you I'm not gonna crack

I'm so happy 'cause today
I found my friends
They're in my head
I'm so ugly, but that's okay
'Cause so are you
Broke our mirrors
Sunday morning is everyday
For all I care
And I'm not scared
Light my candles in a daze
'Cause I've found god

Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah yeah yeah yeah
Yeah

I like it I'm not gonna crack
I miss you I'm not gonna crack
I love you I'm not gonna crack
I killed you I'm not gonna crack

I like it I'm not gonna crack
I miss you I'm not gonna crack
I love you I'm not gonna crack
I killed you I'm not gonna crack

His lyrics describe a number of Bipolar Disorder symptoms:
"friends ... In my head" - (hallucinations - both manic and depressive)
"I'm so ugly .. So are you" and "I'm so lonely..." and "I'm to blame..." and "Sunday morning ..."(in depression, feelings of hopelessness, worthlessness, dissociation and distrust of others) 
".. I found God" and "my will is good" (Bipolar Disorder often leads us to re-examing our spiritual beliefs and faith. Many bipolars experience delusions that they have been chosen by God or that they have tapped into a spiritual truth that others cannot perceive. Delusions of grandeur, an exaggerated belief in one's power or influence, is relatively common in severe mania.)
"I'm so excited..." and "I'm so horny.." (both an elevated mood/energy and increased sexual drive are very common symptoms of mania.)
"I like it.... etc" (This chorus reflects the frenzy, desperation and intensity of a Bipolar Disorder.)
"I like it, I miss you, I love you, I kill you" reflects trying to ride out an episode, and being determined not to crack.