Upon reflection, I think that these are among the most likely possiblities for the future of Dipper and Wendy.
A: They both move on and remain best friends until the series end. A decent enough route, but not my first choice.
B: Dipper tries and fails in other relationships, and eventually, at some point in the future, perhaps when Dipper, Mable, and Wendy are all in their early twenties, a glimer of possibility of a relationship greater than friendship might exist. And perhaps Wendy might be able to see Dipper as something other than a kid after ten years. They might start going down a path that will lead somewhere.
I abviously prefer B. I imagine a scenario in which Mable, who has been by Dipper's side the entire time, tells Wendy how he never really stopped loving her despite trying to make other relationships work. She might then ask Wendy what other guys she had met that had always been there, always done the little things, and always did difficult, boring, or painful tasks just to spend some time with her.
Alternatively everyone moves on including Dipper and they remain really good friends for the rest of their lives. But for some reason I just can't let go that little glimmer of possibility. Maybe it's because I relate to Dipper so much and feel a great connection with the character. I want him to succeed.
Maybe I am lamenting too much on this. But Dipper is my favorite character and I love the entire main cast to death. So I guess I just like to talk about what I'd like to see in the show.
Even if Gravity Falls itself ends after a one summer long arc which might only last 3-4 seasons, there is still plenty of room after that for a movie or maybe another series following the characters.
Either way, I respect Hirsch as the creator of Gravity Falls and I'm sure I'll love what ever he creates.
Honestly, this is the best Disney Cartoon since Gargoyles.
Well, now that I've gotten the point of this thread out of my system I suppose it's time to talk secrets, theories, and other points of interest.
I look forward to future conversation and debate with you my fellow Gravity Falls fans and members of the wiki community.