Alcohol affected to easy speak my weakness

I lost the last train on Friday night, my friend stayed me at his house. we were drinking and talking all night about how to improve capoeira skills. He can speak English fluently, I also asked him what is the important things that I will speak English better. He said the problem is my lack of confidence. I know that, however, I could not change my mind that is another difficulties. There were many my complaints that night, Alcohol affected to easy speak friends my weakness and annoyance that is always I hide in my mind and try to not express another person.