Bisexuality Support Group
Bisexuality is a sexual orientation which refers to the aesthetic, romantic, and/or sexual attraction of individuals to other individuals of both their own and the opposite gender or sex. Most bisexuals are not equally attracted to men and women, and may even shift between states of finding either sex exclusively attractive over the course of time.
Either way as a bisexual person I dont think you should ignore this at all, you should address it. How can you have a relationship with someone who isnt really acknowledging part of who you are?
Since you don't want to hear that he will probably never change his opinion, I will not say it.