The term sex as in homo-hetero-bi-sexual implies action. Sexual action, not just mere attraction. Action vs thought as I stated previously. So by your contrived definition If I am merely "attracted" to the opposite sex I am a homosexual. In that case you agree with my statement concerning mere thought of sexual act with opposite sex making one a homosexual in ones mind. We have elevated over the physical consummating action and realized it's the thought that is the seed. I'm glad you agree.
You can humor term Bi-sexual if you like but you are homosexual definitely the first time you act and possibly upon entertaining the thought as previously stated.