Depends on how you define the target group - try Asimov's Norby series
They don't have graphic sex scenes, and it's well known people have lovers. I was looking at the same sort of audience the Lord of the Rings and Hobbit are supposedly aimed at, which I was under the impression of as being the 12 and up group, year 7 onwards. But of you want to limit it to say ten years old and under, you would exclude Webber, but you'd also have to exclude Tolkien as well - and he was in the original list.
A lot of the stuff I read in the first years of high school recognised the concept of lovers - especially the stuff by Shakespear.