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What your "college" is proposing is very dangerous. Though neutral and ground are connected together at the main panel, the ground is not intended to provide a current path as the neutral conductor is. I sure hope he doesn't have a license, he is giving you very poor advice that could get someone electrocuted very easily. You do not have an available neutral wire in your switch box as it is wired up in a switch loop configuration. This means the neutral wire is at your light fixture. If you want to install a receptacle then you'll need to install a two conductor plus ground cable between your light fixture and the receptacle location.
It's obvious that the other two wires in your switch box are just passing through and since your main breaker did not cut the power through these wires, I'm assuming that they may go to a different apartment than yours.
You can use a piece of wiremold to install on the surface of the wall to install the cable between the fixture and the receptacle, then it can be painted to blend in, otherwise you'll have to fish it up inside the stud cavities.
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