I feel I should mention that if we were the last two people on earth, I would expect you to refuse to date me. I’m not exactly a catch.
Dylan, as usual covers this first in Talkin’ World War III Blues
Well, I spied a girl and before she could leave
I said, let’s go and play Adam and Eve
I took her by the hand and my heart it was thumpin’
When she said, hey man, you crazy or sumpin’
You seen what happened last time they started
If the two of us were last on Earth
Of all other people was an infinite dearth,
Dating you probably still wouldn’t be
'cause long distance loves just ain’t for me!
I’d write, though. I’d send letters via that snail mail I’ve heard about. Snails would still be around, right?
Well, it’s not a date actually.
Let’s just call it friends having coffee together.
Only if you promise to do all the washing, cooking and cleaning! 
So what would I be, an android?
It’s my working assumption that everyone on the internet except me is a bot, so, yes.
If you were the last person on earth, I think I’d have bigger issues than whether we would date or not.
A student showed me the question and response yesterday. The answer given was “No, because if you are the last person alive, then I don’t exist.”
Clever, but I was sure that the Dope could do better, and I’m not disappointed.
It also reminded me of a SNL routine where a timid guy was trying to ask out a woman, and they were the last people alive. She was blowing him off.
I think this actually should have gone in MPSIMS.
Raises hand
YES! Because I’m the last person on the moon!
Do I win a prize??? 
Alternate answer: “You won’t hear me protesting, but I hope you’re a necrophiliac.”
No, but I’m just kind of a mean prick.
Do you look cute in a dress?
There isn’t enough beer in the world. (just kidding!)
I’d be a friend with benefits.
And are you really sure about yourself?
My answer is yes, I’m sure I’m not a bot, but you’d be a fool to take my word for it.
How you you feel about taking your word for it?
Oh, the bots know better;
They’re smart and can tell one of their own;
How do I know? Uhh, I heard it on the inter-tubes;
return();
If you meant “last” as in “last in line behind 7 billion people,” it’d depend on my method of transport.