I'm a guy. If I don't like girls, nor do I like guys, does that mean I'm gay?
Am I gay if I like neither girls nor guys?
No, it does not necessarily. Your sexual preference is based on who you ARE attracted to, not what does not turn you on. If you find you have no sex drive at all, this is called asexual. But you did not mention what you do find arrousing either. Hope this helps.