Could I be bi?

So I've always wondered because I've had crushes on girls and have sex dreams about women. When I'm drunk, I just wanna kiss all the girlies. I've only ever been with a man, married to one. Never had the opportunity to hook up with a woman even though I tried to via apps, etc. But yeah, the opportunity never arose. But I always wondered if I am cause. I've always been curious and given my attraction and crushes on women. And I still think about wanting to be with a women. But idk I'm just curious or actually bi? How does one know for sure?