So long story,

I've known this girl from a good friend, and at some point I started being very interrested in her. At that point we were pretty good friends. Then came the birthday of my good friend and me and the girl were flirting the whole evening, of course we both had already drank a lot so maybe the alcohol should be mentioned. Later that evening after a lot of flirting when we said goodbye we started making out. Next Day comes and we just discussed it and kind of just stopped it there. We both were ok with the situation and no one of us regretted that evening so far. 

&amp;#x200B;

Month later and its the birthday of the girl.

There are like 14 people and everyone is already pretty drunk and the evening so far is pretty funny. I still had interest in her but she started dating someone else and on that evening she flirted with some other guy. I didn't really care since I had other things in mind and I just didn't want to destroy the evening for myself. Later me and my good friend,best friend of the girl, go for a little walk (5-10 minutes), and she tells me that the girl told her that she wanted to make out with me again, so me who is interested in her goes like "Yeah, I'm down." I have to mention that i'm pretty drunk at this point and when I look back now i'm kind of ashamed but me and my good friend walk back and she went in before me. As soon as I walk in my best friend told the girl something and the girl just comes out and we started making out for like 5 minutes straight until her brother started looking for her but I think he didn't see anything. Anyway next day we went to a "Fasnachtsumzug" (i really dont know how to explain it in english, look it up you will immeaditely get it. And there she sees her "date" making out with another girl so she was pretty devastated at first. On that evening i text her and ask why she so devastated since she has made out with 2 guys the evening before. The didn't remember making out with me because of the alcohol and i explain her what happened and again we just remained there. But a day later she texts me asking what the fuck is wrong with me and stuff like that and accuses me of using her to make out only because she was so drunk which I really didn't know since at the point where we made out I didn't see her for like 40 minutes and couldn't have known. Now she makes it look like I knew that she was drunk and I was too irresponsible to check on her before she literally ran me over to make out with me and flirted with me on the same evening two hours before. I actually apoligized that I should have been more responsible and stuff like that but she just spitted on that. And in between the 2 evenings we talked a lot and were pretty good friends. Am I wrong and should I have been more responsible or what went wrong?