deadannoyance

I (f24) have two really good online friends. I have started to develop feelings for one of them(f23). Both of them live in different countries than me. I’ve told my one friend about my feelings and she has been very supportive of me. The one I like, we constantly flirt with each other but I fear telling her about my feelings. I don’t want to lose either of them as friends. But I also really want to tell her. How would you approach this?