[Spock rolls his eyes.]

I'm not about to ask her to marry me, if that's what you're concerned about. [He hasn't even met her parents!] I'm just not interested in pursuing this if there isn't a chance it will go anywhere, you know? I want it to have meaning. I'm not like you.

[It's not meant in an offensive way - Kirk just isn't usually the meaningful relationship type from what he's seen. Nothing wrong with that, but it just wasn't the life for him.]