Malikil,
Don't panic too much! My hubby and I used to use long grain rice instead of arborio becuase it was a lot cheaper (we were super frugal as we were both students living off the government but wanted to save up to go overseas!). Sure it's not as good, but still edible.

I would cook your rice as normal and then stir through your risotto flavourings and maybe some stock or canned soup or even packet soup made up to make it saucy - just like RoryRory suggested.

And just to make your dinner sound delish - we used to use long grain rice cooked and mixed with 1 pack of Homebrand Spring Vegetable Soup and 1 cup of water. Top with chilli sauce AND (if we were going all out) cheese. That meal cost about $1.20 for two.