Soooo… Andrew decides he needs to leave to go to LA to find himself and work things out for himself. He sums up their relationship as follows:
Andrew Largeman: This isn't a conversation about [us] being over. I'm not like, putting a period at the end of this. I'm putting like... an ellipsis on it.
Then they say goodbye, he leaves to get on his plane. Yadayadayada. And we see him rush back to talk to Sam.
Andrew Largeman: You remember that idea I had about working stuff out on my own and then finding you once I figured stuff out?
Sam: The ellipsis?
Andrew Largeman: Yes, the ellipsis. It's dumb. It's dumb. It's an awful idea. I'm not gonna do it, okay? 'Cause like you said, this is it. This is life. And I'm in love with you, Samantha. I think that's the only thing I've ever been really sure of in my entire life.