am I bisexual?

I currently have a boyfriend who I've been with for 2 years. I've always had boyfriends. For the past year or so, I've been really attracted to women. I want to explore and be with a girl to see if I am. But I'm scared if I do find out I'm more attracted to girls he won't want anything to do with me anymore. I don't even like having sex with him anymore bc it's not what I want. Someone help please 😭