I’m not sure what to do

I’m not even sure if I’m eligible to post on here or not but here it goes. I’m in a constant battle with myself. In my mind I know I too like both girls and boys but my religion reminds me that the desire for girls is going against god’s wants. My family is very religious and is constantly talking down on anything that even remotely associates with LGBT community. I’m 16 btw. Two years ago I expressed to my parents about my feelings for other girls but because of something that happened in the past they believe that it’s just a phase pretty much and it’s the devil playing games with me. They say all I have to do is keep praying and have a strong relationship with god. I’ve tried everything to try to make myself not be bi, but nothing working and I feel like I’m just alone now. No knows I’m bi but a year ago my friend invited me to the gay-straight alliance club at our school. I really wanted to go but of course my parents were completely against it just bringing it up once had them talking about it for months after. They couldn’t believe I’d say such a thing. I’ve had crushes on many girls but I have this friend that I’ve known since middle school and I still can’t stop crushing on her. We no longer have any classes or lunch periods together but everyday we each other to our last class. Sometimes we might walk to a Bill Miller’s after school, but I’m tearing myself apart not being able to share my true thoughts with anyone. She’s always telling me about the crushes she has on other people and I know I sound stupid but sometimes I feel like she’s the only one that cares. I don’t have many friends and I’m not even sure if I had a purpose of typing this but I just had to let it out somewhere and was hoping maybe I could get some advice on how to deal with things better.