Rejected by My Best Friend Alpha

Zeke and I always said we'd be best friends forever since we were pups. Everyone always assumed we'd end up as mates but we laughed it off. So when we both turned 18 and the string of destiny snapped into place tying us together, I was over the moon. But Zeke telling me he'd never mate with a mutt like me.
Now my worst enemy Chris and I have a plan.
"What if…we fake dated?"
"What?"
"Nothing would really piss Zeke off more than not only you saying no to being his breeder than also making him think we're getting each other's rocks off"
"You in?"
I stuck my hand out. "You got it, boyfriend."