Go again, and if possible have a show and tell item, most guilds have a show and tell time. And just smile--its amazing what a smile will do. Speak to the person next to you, ask a question when it doesn't interrupt a guest presentation. Most quilters will respond if given the chance. Sometimes they are insecure with new people too.
In our guild we have a "greeter" who has been a member for a while so she knows the regulars (if not by name by face) she will take a newcomer and introduce her to one or two people so it usually makes things go easier. Hope you find some great quilt friends through the guild, also be sure to take in any quilt show in your area. Its amazing what you see at a quilt show. Good luck.