The End of the World 2x05
Future Max: I've fought a thousand battles...but watching you do that was the hardest thing I've ever had to do.
Liz: The look on his face...on your face.
Future Max: Maybe it's for the best. For you, too.
Liz: What are you talking about?
Future Max: I saw you with Kyle. He's turning out to be a...a great guy. Maybe it would be better for you to be with a human.
Liz: Don't you realize what you are to me...and you're always gonna be? You're the love of my life. Everyone else is gonna be second best. There'll never be another you.
"Your soulmate is not someone that comes into your life peacefully. It is who comes to make you question things, who changes your reality, somebody that marks a before and after in your life. It is not the human being everyone has idealized, but an ordinary person, who manages to revolutionize your world in a second …"