Hi Annie,
What you described is not qualified rape.
It is natural to not want to be touched by strangers and being drunk in itself can make you reactive. You are putting yourself in seriously compromising situations where in the future you could get raped, though. If that isn't what you want then you need to stay away from mood altering substances and stay away from questionable situations.
I hope you will get some help to understand why you are making this kind of choice and help to have self-control. A drink or drugs is not worth doing this to yourself.
It does seem like you have problems, so please get some help, or else just stop the drinking and drugs and make some real friends. Goodness!