The Courtship of Eddie's Father, by Mark Toby.
First, I found this snippet from a story in the magazine "Good Housekeeping", volume 153, page 187, from 1961. The whole thing is not available online, but searching through Google Books gave me this:
“You bet! ! !” We sat there for a minute, grinning at each other. Then I picked up the telephone. I dialed Elizabeth's number. Ed. die watched me with shining eyes. Rule eight, remember? Fall in love; it makes you brave. Ah, yes. Very brave. e.
I'm assuming the "e." means end in that snippet.
You can search through random snippets of the magazine on Google Books, but I couldn't get the exact text to show up - the closest I got was right above it:
You can also see that there are results for the words "very brave" on page 187 at Hathitrust.
I found it by doing a Google Books search for
"love" "makes you brave", and it was about the tenth result. Then I just had to go searching for confirmation.
From what I see on Amazon, the issue contains an entire novel (as seen on the cover).
I searched through the book for "novel" on Google Books, which led to me finding the title, The Courtship of Eddie's Father:
The reviews on Goodreads indicate that this is not a fantasy novel, however. It also had a sitcom based off of the novel, which was not fantasy.
Going to the Google Books page for the book directly, we can see that it ends on the "fall in love" lines, on their own paragraph:
[Ed]die watched me with shining eyes.
Rule eight, remember? Fall in love; it makes you brave.
Ah, yes. Very brave.