[spoiler]Plus that's a much much younger Wendy and feelings change after puberty and such. You can also find someone cute while simultaneously wanting nothing more than friendship.[/spoiler]
[spoiler]Haha, no, not all the time.
My first crush was a girl in my kindergarten class. A huge crush. Many years later, I found out she attended my junior high, and the feelings came right back. Not as powerful as when I was in elementary, but it was definitely still there.
We don't actually know if Wendy's feelings have completely changed, only that he's too young, so deliberating it is out of the question. At least, she feels it's out of the question; some others wouldn't. They're both very young, after all, so it's not taboo.[/spoiler]
[spoiler]
As for wanting to see Dipper have a romance with someone, he's 12/13 and kids usually do not have romances at that age. They're like Dipper & Mabel, in the sense that they're growing up and learning little tidbits about crushing on someone, relationships, etc. I love what Dipper tells Gideon in the first Weirdmageddon episode, about how he learned this summer that you can't force someone to love you and that the best you can do is strive to be someone worthy of loving. That is why I loved the end with Wendy & Dipper. It's a sign of growth.[/spoiler]
[spoiler]Aang was 12, Katara was 14, and yet, they shared a long passionate kiss at the ending of Avatar. Even their clothes looked rather matrimonial. And don't even get me started on how many kids in elementary school had relationships.
As for his speech to Gideon, Dipper ruined what he had with Wendy because he was obsessive and immature about his crush. That's why he said you can't
force someone to love you.
Even Robbie, who is her age, didn't handle the relationship any better. Therefore, it didn't work out. Dipper noticed that and realized she could never be with him until his mentality changed.
And that's the thing; I believe Dipper has changed after everything that's happened. Very much like how Aang matured and grew into a person Katara could fall in love with.
I'm not saying Wendy has to be
in love with Dipper, but some feelings are most likely still there.[/spoiler]