I'm in love with my best friend iin?

Honestly, I have no idea what to do and my last resort is the internet, please help. Well, basically, I'm in love with my best friend. We're both bisexual females and if you're against gay relationships please imagine my friend as a guy in order to give an impartial opinion. We both have boyfriends but we've made out and done other things when we were both single although we were never in a official relationship.

When I first started dating my boyfriend, I really liked him but now I just don't but I don't want to hurt him which is why i haven't broken up with him. I think my best friend feels the same way about her boyfriend but I'm not sure if thats a unbiased conclusion. I'm also friends with her boyfriend and as bad as I want to date her, I don't want him to get hurt either.

However, whenever I'm around them and they're kissing, holding hands, etc I can't help but feeling jealous. I know I'm in love with her and we flirt but she had no idea about my feelings for her. Also, if we were to date and hypothetically breakup, I don't want our friendship to be compromised.

Lastly, my parents are very religious people who are against gay relationships. I still live with them because I'm a teenager but I know they wouldn't approve.

So please, give me your advice, I have no idea what to do at this point. Also, is it normal to fall in love with your best friend?