After counting the votes on all platforms (Wattpad, WebNovel, fanfiction.net and Discord) it ended up being a tie.
I was asked what I would do if it was a tie, and I said that I would most likely have to do both love interests to make most people happy.
Even if I didn't add the third option I probably would've done both if it was a tie anyway
Windshear the Razorwhip(Heather's dragon. Wind-wing/Cinder-shear
Votes: 7
Stormfly the Deadly Nadder(Astrid's dragon. Cinder-Storm/Storm-wing
Votes: 7
Cinder-Wind-Storm(both love interests, maybe.)
Votes: 4
The number of votes is including the ones currently on WebNovel