Why wont you let me love you?

"-Can I still see you? Answer me.
-I can't see you. If I see you, I'll never leave you.
-What will you do if I find someone else?
-Be jealous.
-You still fancy me?
-Of course.
-Will you hold me?... You did love me?
-I'll always love you. I hate hurting you.
-Why are you?
-Because I'm selfish. And I think I'll be happier with her.
-You won't. You'll miss me. No one will ever love you as much as I do. Why isn't love enough?"