Still questioning, have an overwhelming amount of signs I might be gay

I can only get aroused to fantasies with woman, i consider myself to be straight, so how does this compulsory heterosexuality would work out for me?

Im questioning bc i dont know about this compulsory heterosexuality, how do i know if i have that?

Until this day even tho i have obsessive and intrusive thoughts abou the same sex i was never able to get aroused and pleasured with same sex fantasies, is very hard, on the other hand womans turns me one very fast, so how do i know if i have this compulsory hetrrosexuality?