Sun, I was going to suggest to try to look over the song, too. I think your H is trying to reach out to you in the only way he knows how right now. Remember, he's definitely not the man you married right now, so don't expect him to act like it. To be honest, sending you song lyrics is exactly the type of thing I would expect from him. He's trying to talk to you... Have a great walk with your puppy.
Most of us really marry only once. First love endures, even unto our dying day. And we never really divorce.