I think that perhaps you are going through a period where you are questioning your sexual identity. I would say first of all don't put too much stock in a definite sexuality as I believe most people are heteroflexible in the right situations.

I myself went through a few periods sexual experimentation. Allow yourself to explore them but also examine your feelings while your are doing such. Is sexual stimulation the only feeling you get or is there also other feelings which could reveal more.

For instance, I sometimes go through periods sadistic sexual fetishes which I know relates directly towards issues with my mother, however rather than suppressing them I simply go down to the local S&M club.

In this manner I am meeting my own sexual needs and hers as well without putting any innocent person in danger.