First off, I'm pretty sure it's "I pick them up" and not "i pick on love".
Maybe the girl, or whoever it is, is disappointed in him, and he can tell. Also the other way around. It seems like whatever they had going could never have been called a relationship, and maybe not even a fling.
I think "goodbye love, goodnight hate" has a big meaning as well. He says "goodbye" to love because he wants it gone forever -- hate, however, will come back between them soon, thus the "goodnight".
First off, I'm pretty sure it's "I pick them up" and not "i pick on love".
Maybe the girl, or whoever it is, is disappointed in him, and he can tell. Also the other way around. It seems like whatever they had going could never have been called a relationship, and maybe not even a fling. I think "goodbye love, goodnight hate" has a big meaning as well. He says "goodbye" to love because he wants it gone forever -- hate, however, will come back between them soon, thus the "goodnight".