Actually, most of us won’t. The delegates will select the frontrunner or elect President Clinton.
You’re right about the next President being either Trump or Clinton, but I think a good number of conservatives will still show up at the polls, hold their noses and vote for Cruz if that becomes necessary, despite not forgetting about how dirty he and his establishment puppetmasters have been playing.
The GOPe may blow a kiss or two Trump’s way in Cleveland after screwing him out of the nomination, praying that he gets on board and brings his millions of supporters with him, but even if he doesn’t there will still be lots of folks suddenly contemplating 4 (or 8, if she survives) years of “President Hillary”, and will dutifully trudge to the polls to vote for Teddy Goldman as the lesser of two evils.
The outcome won’t be affected one bit, but some will feel the need to try.