At this point in my life, the list of male partners is somewhat longer than the female list, but neither is particularly long. I think the difference is more situational rather than by design. I wouldn't describe my attractions as being dead center, but there or thereabouts. However, that is not a prerequisite for bisexuality. All you need is "some" degree of attraction to the same sex.
Anyway, I knew my 2nd wife for better than 12 years before we got married 9 years ago. She knows everything about me except for the extent of my shoe collection! However, so far I haven't felt the need to go looking for anything else. I wouldn't say that would be an absolute certainty going forward, but it would take some extraordinary circumstances for me to consider doing anything different. Also, in contrast to some here, I don't have any coincidence of dressing and male attraction. For me, they tend to be sort of mutually exclusive; not saying it couldn't be, but that would be counter to my history.
In regards to the original question, I think it depends upon the relationship and the people involved. What needs to get sorted is what kind of relationship do you want and how much variance/flexibility can be tolerated. This is not the work of a minute as these are tough questions and it is different from how people usually think of relationships. And, in any situation like this, there are always the possibilities that it either cannot be worked out or major sacrifices need to be made. For the former, it can be tough to fold up the tent and move on, but sometimes that is precisely what needs to happen. For the latter, sometimes sacrifices can lead to long term resentment.
Anyway, Good Luck on your journey.