I dont think I can cope anymore?

I am 23 almost 24 and never had a girlfriend. I am quite good looking but fairly quiet which means that girls almost never notice me. I try hard to talk but I always get told I am quiet which brings my self esteem down. All I want is to feel comfortable in conversation so that girls can get to know me and like me for who I am. What can I do? Will I ever have a girlfriend? At what age did you get your first serious girlfriend?