Hi.
There are a couple of orientations: sexual orientation and romantic orientation.
For example: my sexual orientation is demibisexual but my romantic orientation is biromantic.
Sexual orientation fluctuates between asexual and alosexual, the former lacking sexual attraction and the latter the opposite. While the romantic one fluctuates between aromantic and alloromantic, using the same explanation that I previously used with sexual orientation.
I think those are basic concepts.
I could discern, maybe, that your romantic orientation is heteroromantic and your sexual orientation is bisexual.
Heteroromantic bisexual.
Sexuality is a very broad spectrum that cannot be covered so tightly.
Of course, it is never too late to find yourself and perhaps I am wrong about your sexual-affective orientation.
I hope I have helped you.