personally, i think this song is about a guy who can't give up on the girl he loves and has got away. so he plays the new girl he's with and doesn't give her his whole heart because it belongs to the other. and he wants to love the new girl but he's scared that it'll all be ruined like the last girl he loved. he thinks the new girl deserves better because he's to selfish to give up the old girl. he's beating himself up about it. quite sad.
personally, i think this song is about a guy who can't give up on the girl he loves and has got away. so he plays the new girl he's with and doesn't give her his whole heart because it belongs to the other. and he wants to love the new girl but he's scared that it'll all be ruined like the last girl he loved. he thinks the new girl deserves better because he's to selfish to give up the old girl. he's beating himself up about it. quite sad.