Scared of being bi?

So lately I’ve been been kinda questioning my sexuality. I have a boyfriend but I can’t stop thinking about how I was attracted to girls before him. And I can see me being with a girl if I weren’t with him. I love him and I don’t plan on leaving him or anything but it just lets me know I’m attracted to boys too. So the big thing is just that I’m kind of scared to be bi (if that make sense) I was sorta raised by the fact it’s wrong to be attracted to the same gender. Is it bad that my religion is holding me from actually finding out what my sexuality is? I mean the big reason I’m scared is because I’m a believer in both heaven AND hell. Idk what to do🤷🏻‍♀️