I'll admit you showing up changes things, but...I can't hate you for it. I want you. I really, really want to hate you, but you make him so happy.
When he showed up here he was wrecked. A complete mess because you had broke up with him. I knew I was getting into a no strings attached thing. I knew the moment you showed up it was almost absolute certainty that I'd be forgotten. I'm not sorry for the time I had with him, so I hope you're not expecting me to apologize to you for it.
Whatever changed at home to cause you to realize you still love him? I'm glad. He needs you.