I'm in a similar situation. I lent my friend my Borat DVD and then hes fucked off and left college. So, I recommend you do what I do: Step 1) Ask for it back, explain it was an expensive present. Step 2) If this fails start using a raised voice. e.g. "OI REMEMBER TO BRING MY PSP IN TOMORROW YES?"
Step 3) If this fails then tell him you want a private word. Take him somewhere ...
