How to gain confidence?

So the other day i bitched out on calling the girl i like. I took 5-6 shots to relax and stopped at that cause i obviously dont want to flirt with inebriation in this situation...so my question is what will help me make that call? all help appreciated, mind altering substances or relaxation tips (by the way im very healthy from exercising so any straight edge or granny answerers shunning drugs can piss off)