To me, the answer's clear: it's having someone near, someone dear.
12 seconds sound clip from the Chitty Chitty Bang Bang (1968) movie soundboard.
You can hear this line at 00:18:52 in the Blu-ray version of the movie.
Quote context
[...]
- Oh. (2)
- Do you think I'm a lunatic, wasting my time on a lot of silly inventions?
- But they aren't silly. They're wonderful.
- Nobody else could think of them.
- That's right. That is right. Nobody else could think of them.
- To me, the answer's clear: it's having someone near, someone dear.
- Someone to care for, to be there for. I have you two.
- Someone to do for, muddle through for. I have you two.
- Someone to share joy or despair with, whichever betides you.
- Life becomes a chore unless you're living for someone to tend to, be a friend to. I have you two.
- Someone to strive for, do or die for. I have you two.
[...]