It depends how sexual your domination is. There has to be an element of attraction underlying your domination if you are sexually aroused by a woman. This is not just because you are dominant, in my opinion. Submission does not automatically make a dominant attracted to them? Or want to dominate that particular person. (This is in my experience, at any rate, I am by no means absolute...)

However the relationship doesn't sound lesbian... if you like men...

If there is sexual attraction, you are probably bisexual.

But this is just my opinion...