While it's not a direct answer, perhaps you could help build his confidence in the first instance. Could he get a job in a bar/ caf? and get used to working with / talking to the public? Or volunteering in a charity shop for the same purpose (Oxfam in HH are looking for volunteers). Confidence plays a big part - as does self belief. And it may help to remember that exposure to uncomfortable situations (e.g. talking to new people, presenting to an audience) can make things easier over time. Being introverted is nothing that needs changing. And don't look at each conversation with a girl as overly important - if it's loaded with intention of getting a girlfriend, girls will pick up on this and likely run a mile - this is a challenge for many young people. Also, many people are nervous when they meet someone - it's about learning to deal with that and going ahead anyway.