"
Please remember
I still want you
And in case, you wonder why...
Well, just wake up
Kiss the good life goodbye
He's still in love. The question to her is "do you know why?"
He says to wake up (fall in love ) and you'll understand why. And when you're in love, you'll kiss the good life goodbye (which he's already explained is not really good. The Good Life is really being with someone.)