Should I confess to her?

I've (M14) been friends with this girl (F15 older by two months) for like 2 years and a half, great friendship, almost like brother and sister. But I've developed feelings for her.

We're both very religious so neither of us don't wants to be in a relationship, but the thrill of confessing and letting her know my how deeply in love I'm with her, it's killing me.

I know that if I confess, even if she likes me too, it's gonna affect how we treat each other as friends (cuz we don't wanna be a couple).

I've been thinking that I might let her know that I do have crush on someone from the church, as she's been asking me if I have a crush on anybody because "our church needs drama". That doesn't mean she wants to be in a relationship cause she has told me that several times. She's just teasing me

But eventually I'd let her know, but I'm not sure. We won't be able to be friends again, like brother and sister. But I also love her sooo much

I'm in the middle of the crossroad...

And I need help