I'm Proudly Asexual, Too.I knew it a long time ago. I think the people around me also know it... they know I will never have any conventional relationship... and well, more conventional than having sexual interests can't be found. I am sure I am not interested in sex, even if my friends think I will not know until I try any relationship... because it's true... I have never had any... But then, I can tell them... "so, does it mean you can't be sure about your heterosexuality (or any other orientation) until you try it?"
I label myself as heteroromantic, because I really feel attracted by the male gender; ... However, I don't feel it's a condition to live happy. If someone arrives, I will receive him just if he demonstrates he wants to evolve with me. I believe asexuality, as any other orientation, makes part of evolution, and acceptance is indispensable.
I am 24 now, and I've never felt a sexual drive. I feel pretty abnormal, by the way! But abnormality is a great adjective in a society where everything seems so mechanical.
I'm proudly asexual and I hope this community grows.