Let it go.

Your idea is worth sh!t anyway, whatever it is.

Plus this sucks: "I want someone else to design, build, deploy and manage a technical project for me (and maybe market and sell it too). They'll of course get (insert equity slice and post-revenue comp plan here), so how awesome is that."

You and everyone else.

Have you talked to a potential customer yet? Start there.

If you can't figure out how to get to a minimal proof of viability from where you're at, just drop it. Getting it built is not the hard part, with or without (insert classmate/colleague).