Even though you want your kid to have a good social life, you can't pressure her to make it happen. Maybe you can gently ask her if she wants some help with this part of her life - professional help, that is. Tell her that there are people out there who can help shy people and that this help can really make a huge difference in a person's life. Maybe she won't take you up on it right away, but she may think it over and follow it up later. At least you will have tried! (As in, you can bring a horse to water but you can't make it drink....)