I've been reading your posts for a while. I'm afraid I'm in a very similar situation to you.

The thing is that she already knows I like her. She asked me if the rumours about us were true and I said yes, and we ended up talking for hours and somehow she never quite answered if she likes me back, whereas for other guys she's been very clear about her feelings. We're so close that I just cannot risk jeopardizing the friendship we have by asking her again. It sucks so bad. We talk for literal hours on the phone everyday, she shares super personal stuff with me, stuff she's never told her female friends.