Yes, you would have a cause of action. The question is whether or not he has homeowners insurance to cover this situation.

I think you should try. Some issues: does the convenience story owe you a legal duty under a negligence theory? Would calling 911 have made a...

If you were at an establishment or some place that was negligent you may have a good case against said establishment. My concern is the...

If he is drunk and you sustained injuries and he's in a commercial vehicle, I would say your prospects at a great recovery are great.

Your friend could sue you, but would have a lot of comparative fault on himself especially since you warned him previously.