I understand what you are asking because I have had the exact same conundrum myself. A lot depends on your definition of feminism; to me it is a matter of female empowerment, not putting down men. Empowerment to have equal rights, not warmongering about female superiority.
The hardest thing about admitting you are submissive is worry that most people will equate that as buying into the crap of male superiority. Ha! Being a submissive is my right as a feminist.