"Now that its stripped you'll need a new bolt anyway and its a dealer item.
You can put the old oil back in and ride it to the dealer and get it fixed, if you do this be sure you have no leaks around the filter from your attempts to get it off."
The above is the best advice I've seen posted.
Here's a couple of hints for the next time:
1. Make sure your bike and oil is fully warmed up before starting work. All drain/filter bolts will loosen more easily and you'll drain more crap out of your bike due to it being in suspension in the warm/hot oil.
2. Make sure you use 6-point sockets only. If you don't have a set, go and buy some...now. Good ones will last a lifetime.
3. Use a torque wrench to re-install both your drain bolt and filter bolt. If you don't know how to use a torque wrench, have a competent mechanic show you how.
Best 'o luck!