When it comes to ladies,when u get older,u always think,if i could have known then,the things that i know now....Guys always try and act macho when they are with their friends and say one thing,then act in totally different manner,especially when girls are concerned,so be careful the advice you take from your friends when it comes to girls.Basically be yourself,as you have already been friends with a girl before.Add to this a little self confidence,and you should be able to talk to any girl.You don't have to say something clever or romantic to get are attention,just the fact that you have the courage to walk up and say Hi,I think you are good looking,can we be friends? means a lot.And always make sure you are looking good as that is a confidence booster,when u look good,you feel good.