Make my teeth clench
And my hands shake
Do you ever see
What you do to me?

You're wearing me out
Just wearing me out
But I'm wearing you down

You're impossible
Lovely
So impossible
To win or please

I'm wearing you out
Just wearing you out
But I'm wearing you down

Take what you want from me
It means nothing now
Take everything from me
It means nothing now

Not so easy to forgive
Harder to forget
Take what you want

I make your lips red
And your moans quake
Try to think through
What I can do to you

It's wearing you thin
Can I begin
To wear you out
Wear you out

Take what you want from me
It means nothing now
Take everything from me
It means nothing now

Not so easy to forgive
Harder to forget
Take what you want

I'm impossible
To figure out
So impossible
You've had your doubts

Take what you want from me
It means nothing now
Take everything honey
It means nothing now

Not so easy to forgive
Harder to forget

Take what you want from me
It means nothing now
Take everything honey
It means nothing now

Not so easy to forgive
Harder to forget
Take what you want from me
Take what you want from me

"Love is a chemistry, a friction. We need to fight it out in a good way, not with threats of leaving, but to, in love, find an understanding." -Wikipedia

This song is very honest in how it shows how challenging relationships can be. Having an honest, close relationship with someone can be one of the most encouraging, rewarding things you ever do. But it can also be one of the most difficult and frustrating. There's a duality here, a ying and yang, a high and a low. "You're impossible to love or leave" means it's hard to love you, but it'd be impossible to leave you too because he does love (her). "Not so easy to forgive, harder to forget" means that its hard to patch things up and work it out, but it would be even harder to break up and forget (her). People are hard to understand to, and that's frustrating "You're impossible to figure out".

What's honest about this song, is that he flips it and then admits that he too, is "Impossible". "I'm impossible to figure out", "I make your lips red and your bones quake". He's causing her some pain and frustration too.

"You're wearing me out, but I'm wearing you down." could mean a couple things. Perhaps he is losing patience with her, but he is wearing her down with his love and patience. Or perhaps she is equally being worn down by his qualities which can be hard to deal with.