I don't like having sex with drunk girls. They generally just lay there and make you do all of the work. Also, they get to desensitized to really enjoy my time.
Was there an actual offer? I have turned down this one girl three different times because she was drunk. This included an offer of 'Will you please come home and sleep with me'.
Now I get to tease her about it.
Do you have her number? Or is she gone from your life? If she is gone, then that is wrong of you. Get a pen!!!! Always!!
If you did, then there is always tomorrow.
All in all, I think you did the right thing.
_________________
Recommended reading list.
Double Your Dating by DD
(This will work on your inner game)
http://www.freewebs.com/xfman/
(This will work on your outer game)