I think this is coming at the end of some relationship (romantic or otherwise) that's been getting worse over time. He knew that once he worked up the courage to break away he'd feel better and this song is at that moment. "This is the feeling that I have been waiting for" He's been waiting to feel strong and empowered after a relationship that's beaten him down. It's claiming his own value that the other person doesn't see.
I think this is coming at the end of some relationship (romantic or otherwise) that's been getting worse over time. He knew that once he worked up the courage to break away he'd feel better and this song is at that moment. "This is the feeling that I have been waiting for" He's been waiting to feel strong and empowered after a relationship that's beaten him down. It's claiming his own value that the other person doesn't see.