I now want to date with my friend, not just the kiss(

A few weeks ago i have written here about how i crave to kiss with my friend, but now we becoming much closer and closer every day, we even walk together without any of our shared friends(what happened rarely before) and making calls all the time on the evening, even her friends have noticed how quickly we have become so close when they knew her since their childhood. And for that short time I realized that I appreciate her more than a best friend or a girl that i want to kiss, I want her beside me. I just really want her to be mine. I need her, and she needs me cause she said so. One problem is her bro from other country that she has been dating from the distance, but shes saying she now just flirting with him and they don’t have any serious connection. He makes me mad but when I tell this to my friend she just doesn’t understand why and I can’t explain it to her. Look, I know that we should have a conversation, but I’m not sure if she would react normally. I think i don’t have a balls to ask her out. But I neeeeeeeeeeeeeeed to.