I'm so sorry you're feeling confused...you're right it is very difficult

I think ultimately we have to do what is right for us. Sadly that can come with unfortunate consequences; emotional blackmail from family members being one of them. Sexuality is a complex topic and there are many schools of thought. I'd like to point out though; lesbian women can and do have relationships with men and you can be more attracted overall to one gender yet still be bisexual. I'm sorry if that doesn't help to clarify the issue any further but i suppose right now the immediate concern is what to do about your current situation. If you feel like something - whatever it is - is missing from your relationship, then that's not a solid foundation to build a marriage on. Have you spoken to him about any of this? What does he think? I wish you all the best in finding the answers you're looking for.