Lack confidence after being beaten up recently!?

I was beaten up recently in a nightclub by a guy who seemed to be just insanely drunk and aggressive and was hitting random people! he was a lot bigger than me ,im only a 5 5 male of medium build! and he seemed to have some kind of boxing skills ,i could not defend myself he was too fast and strong!so i ended up with some facial injuries! since then my confidence is low! im actually afraid to go out to pubs an clubs again in fear of this happening again! my self esteem is low,i feel i looked like a total wimp because i got this beating in front of a lot of people who were there! A friend recommended i take up a martial art to try and defend myself! and the bouncer on the door of the club said the same after he threw the person out of the premises that i should learn to defend myself better! that its really a must in this day and age! what do you think i should do about my low confidence first of all and would martial arts help?