"I'm a train wreck in the morning

I'm a bitch in the afternoon
Every now and then without warning
I can be really mean towards you

I'm a puzzle yes indeed
Ever complex in every way
And all the pieces aren't even in the box
And yet you see the picture clear as day

I don't know why you love me
And that's why I love you
You catch me when I fall
Accept me, flaws and all"