I would like to have a party at my house but don't want to be held liable in case someone got hurt or drinks too much.

Absolutely not.  It's not liability to the people drinking that you have to worry about (although you could conceivably have some liability to them as well), it's the people they hurt after getting drunk at your house who are going to sue you for everything you're worth.  Obviously, a waiver from the drunk driver, even if its valid, would not be binding on the people the drunk driver hits.  I assume that you are not charging anything for this party (if you are, dram shop statutes may apply and your liability would be greater).  If you act reasonably to assure everyone's safety, don't serve alcohol to minors or anyone already drunk, and make sure that nobody drives drunk (take keys at the door and provide designated drivers or cabs), you should probably be ok, but there are no guarantees.