It is a life experience that should be treated as a source of learning to make better choices in the future. Since it was the first party you went to after many years of not going to parties, there must have been some issues preventing you from socializing in the past, so that is worth looking into. On a mechanical level, you need to decide how you will avoid drinking so much in the future. While it is not your fault that you drank so much (you did not hurt anybody by doing it), it was a bad choice and you are responsible for it. If you own that you did it and take responsibility for it, there is less of a chance of repeat incidents. Feeling ashamed, embarrassed, alone, betrayed, etc. is all counter-productive and serves no useful purpose, but tracing your steps back to determine when you lost control and out of that calculating how many shots you can safely handle would produce better outcomes in the future.

Also from your description it appears that you did not eat and did not drink non-alcoholic beverages alongside consuming alcohol. That means that you are unaware of the basic rules of alcohol consumption hygiene. You need to have a complete meal and to drink 1:1 non-alcoholic to alcoholic drinks, at least, if not more - i.e. diluting alcohol. Had you not drunk a whole bottle of Bacardi but instead had cocktails with Bacardi that are at least 1/2 juice, you would not have lost control of the situation as much.

Also go to planned parenthool and get tested for STI's - just wait a couple of weeks because the tests are invalid if given too soon.

To sum up:

- find out why you drank so much on an emotional level (what happened that prevented you from socializing for many years and what you were trying to cover with drinking)

- find out what you max dose of alcohol per night is, in terms of safety

- learn and apply the rules of alcohol consumption hygiene.

- possibly, start drinking a small amount of alcohol on a regular basis to get used to moderate consumption to avoid binge drinking. What you describe is called binge drinking and it is very common among young people in the US. If you learn a bit of mixology and become skilled at making at least a few cocktails and get used to drinking them, you would be less prone to go on a drinking binge.

- combining beer with vodka... yuck.

The guy friend did take advantage of you and did contribute to your wasted state by giving you three shots of vodka when you were already out of it, but by then you had drunk almost a whole bottle of rum, plus beer, plus some vodka, and you need to take responsibility for it. Taking responsibility is what teaches one to grow up and make smarter choices in the future.